Is Oil Consumption a Concern on 2023 Chevy Silverado 3.0L Duramax Diesel? 

If the truck left the factory with a extra quart of oil in it and after 2500 miles your down to under a half on the dip stick, that's a lot of oil used in 2500 miles.

I bought a 2020 Silverado HC 3.0 diesel. At 2,500 miles it was barely registering on the tip stick. Ended up doing a consumption test with my dealer and it exceeded gm specs. I traded it in with 18.5k miles for a 21 AT4 3.0 diesel. It has been flawless. The most oil used so far has been 1/2 qt over 6,500 mile intervals. MPGs are phenomenal with 22-24 city and 27 to 34 on hwy. Best 400 mile loop was 29mpg and best 50 mile loop is 34.7mpg. Seems to sip DEF. Sitting @ 46600 miles now.

I have the 2022 Silverado with 3.0 duramax and 51k miles. Due to all the oil usage reports, I have kept a watchful-eye on the dipstick since new . I change the oil based on when the built in monitor says it is time. We own a ranch and this truck is put to task. It does not have an easy life. I have never once found the engine to have used oil. Something is being concealed here. There are many reports of trucks that are not using oil, and others using a substantial amount of oil. The fleet should be consistent. There appears to be a manufacturing issue. My two cents.

I have a feeling the 0W-20 DexosD has something to do with it. Also, I am sure your consumption will go down once the engine has more miles on it.

My household owns 5 vehicles with all but one having more than 100K miles. One with 198K miles uses about 1Q/10K miles, one with 185K uses about 1Q/8K miles, the others don't use any. Trying to convince me that 1Q/2K miles is acceptable in a new vehicle is a non-starter for me.

This oil consumption isn't a diesel thing, its a GM thing. I have several friends with GM trucks with the gas engines, and when they change the oil at 5,000 miles it will be down 1 to 2 quarts and GM says this is normal and don't worry about it, lol. But if you let it go down to around 3 quarts low it will start to starve the engine of oil and can destroy the engine. Oh and my 2014 Toyota Tundra with 150, 000 miles that I over load and tow with a lot, doesn't lose one drop of oil at every oil change.

Make sure to check your owners manual. The oil level is usually right in the middle of the high and low mark after shutting down the engine and takes overnight for the oil level to reach the full mark on my Chevy gasser. For a gas engine Chevy: Check the engine oil level after the engine has been off for at least 2 hours. Checking oil too soon after engine shutdown can result in incorrect readings.

Diesel was a 1.60 more per gallon today when I stopped for fuel. My last truck was a Duramax and I kept it 11 years. But now days between the cost of fuel, all the expensive emissions equipment, extra cost on filters and DEF. Only way I’d own a diesel is if I towed heavy A LOT. By that I mean several days a week or you tow long distances regularly. If you aren’t pulling a bunch, I just don’t think they are worth the hassle.

What’s interesting is that ever since I’ve owned a 2007 Avalanche, I’ve been told by GM that the accepted consumption was 1 Qt per 2000 miles back then. I’ve never had consumption issues in other brands.

So happy GM increased the price by 10K in Canada and I cancelled my GMC Sierra 3.0 order and got the Tundra instead. After 10,000 km same oil amount as at the beginning...

My 2021 AT4 was eating a quart every 500 miles. After a year of oil consumption testing they took my truck in for a "fix". It was a bad baffle in the valve cover, or at least that's what I was told. The fix seems to have worked, but it took 3 1/2 months to get it fixed. It has been back in the shop again to fix check engine lights.

I had a 2020 GMC 6.2L and it Consumed OIL - GM tech said was normal. First new truck I’ve drove that when getting fuel / add litre of Oil. So wasn’t going to argue with GM, that’s crazy and SOLD it !!!! I’ve drove a few trucks, all brands and never had a motor Consume oil like this 6.2L did. I was considering a 3.0L diesel GM, but maybe I’ll stick with my Ford.

a few years ago the f150 5.0 engine used oil ford fix was to give you a longer dip stick and add one more quart of oil in

I’ve been in the auto business since the mid 70s and virtually every manufacturer has similar oil consumption specs. BMW wouldn’t address the issue unless you used more than a quart very 1000 miles.

I follow the owners manual, from the "Vehicle Care" section on page 26 of the Diesel Supplement with my 21 with LM2 titled "Checking Engine Oil" . To get an accurate reading, park the vehicle on level ground. Check the engine oil level after the engine has been off for at least two hours. Checking the engine oil level on steep grades or too soon after engine shutoff can result in incorrect readings. Accuracy improves when checking a cold engine prior to starting. Remove the dipstick and check the level. . If unable to wait two hours, the engine must be off for at least 15 minutes if the engine is warm, or at least 30 minutes if the engine is not warm. Pull out the dipstick, wipe it with a clean paper towel or cloth, then push it back in all the way. Remove it again, keeping the tip down, and check the level.

Didn’t think GM made a 2 stroke diesel any longer.

My 2020 GMC is currently undergoing an oil consumption test (2k miles test per dealer) Truck has 33k miles and on a recent 2k mile trip I added 1 quart each way and when I arrived at home oil was half way between low and high marks. We'll see what happens in a few months after I go back to the dealer, but what bummer to have to constantly add oil on such a new vehicle! Love the channel and how you dig deep on these issues.

You can include myself! I never heard of such a thing. I bought the diesel thinking that it would be my last vehicle. Def, oil, diesel! What the???😮

I guess that explains the oil change interval from your earlier video. You don't need to worry about changing oil as you are steadily adding new oil. Just need to change the oil filter at some point.

GM excuse built in so they can say “it’s normal…they all do it” crap. About the oil pan change. There goes your warranty

GM also uses low tension piston rings. If it takes a couple extra cases of oil over 200k miles, I'm ok with it since I've seen multiple 5.3 V8's with well over 200k on them which still show faint honing cross hatch in the cylinders, and it's because of the low tension rings. Cadillac Northstars were acceptable using 1 qt/1000 miles 25 years ago, but on them it went out the tailpipe, sides of the block, and main seals. A lot of them used more coolant than oil too.

You have 2500 miles on your truck, and you're just below the halfway mark on the dipstick, and GM over fills the new trucks by one quart. This isn't right. A new truck shouldn't be using any oil.

I have had nothing but trouble out of mine. Been in the shop for 8 months. Numerous parts replaced.

I had a 2021 LM2 diesel .... put 40,000 Miles on it .... I usually make it 1/2 way through an oil change and had to add a quart ...I had to pack a quart in a brand new truck ... because that crazy oil is impossible to find anywhere except the dealer. I was like ... this is crazy --BUT loved the fuel mileage so much i bought a 2023 with the LM0 -- Just assuming GM would address the oil burning problem because its nuts! -- So far so good ... not burning oil (but I'm only 1/2 way to the first oil change) -- If you say they put an extra quart in at factory.... then my guess is this engine burns oil too.

Mfg for years have had acceptable standards for oil use or burn in 90’s acceptable oil consumption of 1quart per 1,000 miles

I got the 2.7 turbo and very happy with it, I know people with 60-80 thousand miles no problem. The 2.7 tows over 9,000 pounds, no need to add DEF, oil change is about 50 dollars, no oil consumption. People say the 2.7 gets bad gas mileage. Its a full size truck with a 24 gallon fuel tank and getting over 450 miles per fill up, and if you do all highway your getting over 500. lets not forget trucks with v8 gets about 350 miles to a full tank and usually the tank size is about 30 gallons. The 3 liter diesel just to much to deal with oil consumption, adding DEF, over 100 dollars for oil change and over 100 dollars to fill up. yes the Diesel gets better gas milage but when you look at your annual cost for diesel, the 2.7 still is cheaper.

I was the original owner of a 2007 Duramax LBZ and towed regularly a 24 foot toy hauler. I barely dropped below full in 7000 miles between oil change intervals using Shaffer's 9000 full synthetic diesel oil. I sold it after 85K miles and the oil consumption never changed.

If you're down a half quart since buying your truck, you've burned 1.5 quarts in 2400 miles (this factors in the extra quart from the factory). That's a lot of oil. Expect to add a quart of oil every 4 or 5 fillups.

On our farm equipment the engines come with a break in oil. Some engines need to run the break in oil longer to get broke in. We keep an eye on break in oil level then when it stops consuming it and so many hours we change to regular oil.

Why not just keep adding that extra quart of oil that the factory used? You get extra capacity without spending money and labor on that pan?

Just wait a couple years until these engines are getting replaced under warranty and GM will say “you never checked the oil”. Warranty void

You need to use Amsoil synthetic oil. This stuff stopped my Tundra from consuming 1 Quart a month. And use a Bypass Oil FIlter too. Great channel Tim!

Owned 2 - 3.0 Dmax trucks and neither one consumed any oil whatsoever. Even when I tow my RV it doesn’t burn any oil. For those who do burn oil, that sure beats having your 5.3 or 6.2 lifters and cams destroyed prematurely!!!

Being from Quebec Canada, been following you since you got your 2023 diesel. Got my 23 Silverado while waiting for my diesel Tahoe for 18 months. I was always aware that the overall costs of the diesel were more than those of a gas engine, since I will be towing a 3500 pounds RV. I wanted to have this great torque at lo rpm to make it fun towing. But know at .80$ a liter more than gaz, a lot of def when towing and a greater oil consumption, I will consider changing my tahoes order for a 6.2 gas. This way I will get the looks of the pipes, the sound, and most probably my order. Thx for all you put on the tube very much interesting.

See this is why manufacturers don't put diesels in trucks that reg people drive that don't know what they are talking about. Most diesels burn oil for thousands of miles until broken in, Even CAT and Cummins engines burn oil up till 50k miles plus till ring a are seated, some closer to 100k, they use to say they are just broken in at 100k 🤷‍♂️ Most people nowadays don't keep these trucks to a 100k nor load them and work them to break them in sooner, so someone who just drives it around like a car will generally see oil consumption and think it's burning oil, something is wrong.

I have 45k on my 3.0 Duramax and don’t have any oil burning problems. I just checked my oil and after 4,800 miles since my last oil change, I am right at the halfway mark on the stick. I did add a quart of oil during and out west trip after towing our camper for about 3,000 miles.

Toyota had a similar problem ~ 12-15 years ago in their 4 cylinder gas engines. My neighbor has one of those cars and he went thru the "oil consumption analysis" goat rope with his Toyota dealer a couple of times,... but his car didn't burn enough oil to warrant an engine change-out .....so they told him too bad so sad...deal with it!!! He told me this story earlier last year and I said why don't you try some Marvel Myster Oil in the crankcase and give it a few thousand miles to see if that helps the oil consumption issue. It seems to have worked for my 2005 E320 diesel as it burned oil and I usually had to add a quart between changes. Ever since I have been using MMO in it though, the oil consumption issue has abated and it no longer burns any oil. Well,...low and behold after ~ 4000 miles, his car no longer burns ANY oil and he is happier than pig in a warm mud puddle on a cold day! MMO doesn't work quickly, it will take 5,000 to 10,000 miles to do its' optimum effect, but for $8 a quart at Wally world, if I were you I would invest $16 and put a quart in your truck right in the parking lot and do the same thing with the second quart at your next oil change and by the time the oil change after that rolls around, I believe you will notice a significant reduction in your truck's appetite for engine oil. I use MMO in everything I have from lawnmowers, motorcycles and all my cars and trucks...it works.

I've got 4,800 miles on my 2023 Silverado 3.0 Duramax. It hasn't burned any oil at all.

Mercedes M series use a ton of oil and the customers are told this is normal. My friend had one and it used a quart a month. They said they would not fix it. It was in the usage range of the manufacturer specs. Probably only 700 or 800 miles per month.

A few years ago gm performance crate engines had consumption problems.. it was because they used low tension oil rings.. most hot rodders would take them apart and install standard tension oil rings and it fixed the problem....

4.6 toy tundra 2010 never added oil

My 2006 Silverado 1500 used a quart every 3000 miles new and was using a quart every 2000 by 25,000miles.. I never had a car/used that much before. My 2016 F150 has 60,000 miles now and it's still full at 7500 mile oil changes and I tow a 7600lb travel trailer with it several times a year.

Issue: Some 2018-2020 F-150 vehicles equipped with a 5.0L engine may exhibit excessive oil consumption of greater than 1L (1 quart) in 4,800 km (3,000 mi) with no visible oil leaks. This may be due to high intake manifold vacuum during some deceleration fuel shut off (DFSO) events resulting in oil being pulled into the combustion chamber from the crankcase, valve guides, and positive crankcase ventilation (PCV). To correct the condition, follow the Service Procedure steps to reprogram the powertrain control module (PCM), install a new engine oil level indicator and change the engine oil and oil filter. The revised PCM calibration reduces engine vacuum during some DFSO events.

MY2020 LM6 with 40k miles uses 1qt between oil changes of 7500 miles. Mainly highway driving at 70mph or less.

I'm totally going to check mine to compare to your results! Very similar miles on my truck. Climate will definitely be a factor I'm imagining.

No that is not the correct way to check your oil. Check the oil 1st thing in the morning before you start it up. And then after that, let the truck get up to operating temperature and then let it sit for approximately 2 to 3 minutes and then check it again. If you start it up (“COLD”) the oil is thicker win oil is cold and you will check the oil and it will show low because it takes a lot longer for the oil to come back to the pan when the engine is cold. It gives you a higher risk of a false oil level reading and you possibly overfilling your engine with oil and could cause damage.

if your truck came with one quart over the full mark, and 2400 miles later its at half quart low. it seems like the oil consumptions is more than expected.

That pickup should have a storage compartment to hold 2 gallons of make up oil. It’s obviously going to need it.

It is settled then, 5w30 it is!!! You should try running 5w30 and see the difference in oil consumption, I bet it will be noticeably different vs the 0w20 piss

I'm wondering how the change from aluminum pistons on the LM2 to steel pistons on the LZ0 is going to play out. Steel piston on LZ0 is shorter than LM2 probably due to weight. I think the rod is longer too which pushes the wrist pin closer to the top.

In my Corvair, I would put a quart of oil in and then check the oil. Every morning.

That saved me not buying buying Suburban diesel. Written in blk & white you can't complain at dealer.

My last 3.0 diesel held 10.5 quarts.

Any oil consumption is to much on a brand new vehicle. Idc what the manufacturer says this isn't normal. You should drain your oil at oil change interval and measure what you have left. So at 1qt per 2000 miles. Your saying at 8,000 miles your gonna burn 4qt of oil? That is absolutely insane for this to be "nornal".

Toyota, had issues with their 2.4 4cl that drank oil. We had a rav4 that would go through 4qts in between oil changes.

I know a man that threw his valve cover cap away and screw in funnel, when engine went to clattering he threw in 4 quarts

I know not a truck but I have a 2010 Kia Sportage with 2.7 ltr V6 . Change oil every 10,000 Klm with Super Tech 5W20 Synthetic oil and never have to add between changes . Might be down 1/2 quart . Presently has 621,000 klms on it .

It seems like the costs associated with owning this truck outweighs the gas mileage boost

Yikes... better keep a case of oil in the truck.

... lol now that I think about it, GM is actually thinking about the end user, I mean look at it this way, you wont need to shell out the hefty price for regular oil service ... you just keep adding every 1,000 to 2,000 miles

All newer Chevy trucks consume oil . It’s a design flaw with the piston rings or the cylinder walls or both .

The oil consumption numbers are maximum… as in we won’t replace your engine unless it exceeds this amount. Doesn’t mean that they WILL use oil. Just covering their butts on engine replacements. Have almost 50k on 2 LM2’s. They haven’t been using oil.

I have a 21 Silverado LM2 mine stopped using oil after my first oil change at 5k miles. I now have 22k miles and tow a 34 foot travel trailer in the summer and still didn't use any oil.

I hate vehicles that burn excessive oil, no excuse for it unless your towing heavy loads at higher speeds. My L5P Duramax burns a half quart of oil between 5K mi oil changes, even when towing. I find this totally acceptable? But 2-3 quarts between changes is totally unacceptable. I was really interested in this truck with the 3.0 Duramax but not now, I had oil burners in the past, a 2013 Honda Accord and a 1988 Chevy Blazer, both GM and Honda refuse to fix the problem so no more Honda's, GM on the other hand has other vehicles that interest me.

You stated that this truck is not using much oil yet based on the statement provided by GM, it has in fact, used 1.5 quarts. Your oil level check revealed the engine is .5 quarts low and with the 1.0 quart overfill, that is a lot of oil usage for a brand new engine. Sounds like another GM engine issue they are trying to talk there way out of.

Jesus. I have a 97 chevy k1500, it's always burned oil since I got it and I sometimes have to change the plugs on #6 and #4 because they get fouled, have no plans of fixing it because it's a cheap truck. It burns a little less than 1 qt every 2k miles. I guess it's actually brand new! Sweet.

I don't know if that's gonna work if the oil Pan is wider it might work but if it's deeper the oil pick up is not gonna be in its place where it needs to be and those 2 Extra quarts of oil isn't gonna matter

Took the Sulphur out of the fuel gotta get it back some where

Holy cow…. 1 quart per 2000 miles!!! Shame of GM. That is absolutely not acceptable. I’ve never owned a pickup that has used even 1 qt per oil change!

I don’t think the service bulletin says it WILL use that much oil, it just says that much oil loss is considered “normal”. Which every company says the same thing - I think Chrysler even went down to 750mi/qt at one time when they had the crappy minivan V6s in the Wranglers. It would be interesting to see if you do burn oil, though that might be difficult to really notice if you’re going to install that aftermarket pan.

I was a GM auto tech for 15 years at a small GMC Buick dealer. I can't tell you how many pistons and rings I did on 5.3 liter and 2.4 liter engines. GM has always considered 1 quart every 2000 miles (within range). I have a 2011 Tacoma with 130,000 miles on it that maybe burns 1/4 a quart in 3 to 4 thousand miles.

I change my oil on my 2021 LM2 at the dealership every 5,000 miles and it isn't using any oil between changes. I check the oil on the dipstick after the truck sits overnight and it's always on the full mark.

It seems that all modern trucks now are poorly built with ridiculous price tags, you would expect better for the price.

this is great you need a case of motor oil in the trunk and oil filter ,when reach 5000 miles change the filter , oil never get old all way is fresh

GM is not saying the truck will use 1 at per 2000 miles but could.

Burning that much oil in an emissions engine is a recipe for disaster. I know after an issue with a 15 liter Cummins using what they said was “in spec”. It trashs the doc, sensors and the dpf. Puts soot in the oil, plugs the oil filter and finally after just 320,000 miles a complete overhaul, which is way below normal for a class 8 truck.

A friend of mine had bought a Chevy traverse it was using oil he took it back to the dealer and they told him the exact same thing you just said for that engine so apparently that's GM's thing across the board

Hi Tim. Do the research. All diesel engines consumers engine oil.

Last year i did the oil pan upgrade ,it was super hard to do ,having a 4x4 truck makes everything so impossible and time consuming,but that was my goal making sure i had enough oil when towing my rv.

Thats insane. Gonna plug up the DPF in no time from the additives that dont burn off. Junk. Glad i went with the 6.6

Whether GM says it’s normal or not this would still be a deal breaker for me. I average 20-25k miles a year with 10k or so of that towing our rv. It’s not a massive rv so a 1/2 ton is fine, but I can’t imagine having to add oil 1-2 times a month. My current ‘21 F150 with the 3.5 Ecoboost might loose 1/2 a quart over a 7500 mile oil change interval. Adding an aftermarket oil pan is fine, but imo a mfg selling a truck that can’t make an oil change interval at regular service let alone severe use without adding oil is bs.

My instinct tells me to switch to a heavier oil like 15w40 ..... the oil thats in from factory is sourced from the lowest bidder

Wow, up to 1 quart/1000 when towing??? My past and current trucks have been miserly with engine oil. My 2016 EcoDiesel 3L turbo diesel consistently used an UNDETECTABLE amount of oil when I towed my family travel trailer in-state (400 mile each way) and on longer multi-state trips. It used 10W-40 though. My current truck for towing a larger travel trailer, '21 Nissan Titan XD, 5.6L gasoline, 0W-20 oil) used one half of a quart last summer over 3500 miles towing, the 2500 miles sightseeing and another 1000 miles between trailer trips. And there were days into the head-wind that were HARD towing. I was (happily) surprised at how little oil the Titan used. Maybe GM is setting an expectation for 'worst case consumption' ?

My 21 Silverado with the 3.0l used only half between factory and first oil change.

Interesting. I’m on our 5th oil change and other then checking when I leave the dealer I have never checked again lol. Maybe I should start. Your comment about the def fluid. I swear there is something wrong with my truck. I’m burning through 10 L of def a month. My 2017 Cummins burned through 10 L a year.

Hey, I can speak to this, and you don't want to put the new oil pan in there. First of all, all engines consume oil to a certain degree. The oil control rings always miss a bit of oil on the downward stroke of the piston, that oil is therefore left on the cylinder walls during the combustion event, atomized/burned, and exhausted (totally normal). Oil is also atomized/aerasolized in the crank case during high RPM events due to splash off of the crankshaft/valvetrain moving more quickly. This atomized oil is moved via the PCV system into the intake air stream and ends up in the combustion chamber again being sent through the exhaust. The third way oil is consumed is this, it literally evaporates under extreme heat. Oil exposed to high heats will "steam" not boil, but it will definitely go from liquid to gas. Oil exposed to the bottom of the pistons via the piston squirters will definitely do this because it is being used to cool an extremely hot surface. This oil vapor will leave the engine via PCV intake stream yadda yadda. As to the larger oil pan, I would definitely suggest you do NOT do that. Greater oil capacity means a longer warm up period for the oil in your engine. Warmer oil is thinner and better suited to the cleaning function that oil is designed to accomplish than cooler oil. The oil pump has to work harder to move cooler oil (and remember, these oil pumps are driven by a belt that has a lifespan). This is a small engine that has been engineered to within an inch of it's tolerances to punch way above it's class. It will consume oil, and probably coolant, just do the right thing. Check your oil once a month when you're filling with diesel and everything will be fine.

Thinner oils and lower tension oil control rings,what could possibly go wrong?😂

When a diesel is broken in. It should not use any oil unless the rings are bad.

Oil consumption in new automobiles seems to be the new normal. If the car burns/uses 1qt 2qt 3qt per 1000mi a service bulletin comes out saying that's normal. I would be concerned with the dpf getting plugged sooner with all the oil being brunt. I would also try a 0w30 or 5w30 oil to see if that would help.

Tim, I did some research on the Dexos "D" for diesel oil. It's a 0w-20 weight full synthetic motor oil. To me, that's just wrong for a new diesel engine. In the first place, using a synthetic oil was never recommended for a new diesel engine until it has 15,000 miles on conventional oil. The purpose of this was to give the rings a chance to properly seat before changing to a full synthetic oil. Then we have the whole 0w-20 oil. That is also just wrong. Diesel weight oil should be 15w-40 for conventional oil or 5w-40 for synthetic. Using the Dexos D oil in that engine is going to prolong the time it takes for the engine to wear in properly and the light weight of that oil is going to cause increase oil consumption. Given this oil, I can see why owners are reporting problems. If it were my engine, I'd switch it out to a good conventional 15w-40 diesel oil for the first 15,000 miles and then make the switch to a 5w-40 synthetic oil. Of course, this would likely void your engine warranty. That's how I broke in my Ford diesel engine and it currently has 310,000 miles on it here in the frozen north and runs perfect with no oil consumption between 5000 mile oil change intervals!

damn!! just when I was convinced this would be my next engine.. Very disappointing

The duramax manual says to wait at least two hours to check the oil level after shutdown.

I have been thinking about getting the diesel denali however if i have to keep oil and DEF ready to go then i guess i just stick to gas.

I got Lexus GX I throw trailers with it ATVs snowmobiles things like that I don't burn any oil one explanation was build on the different quality restrictions in Japan

Hello Tim, I would appreciate on your next video if you would correct your statement concerning oil consumption? The service bulletin you referenced what was for an accepted usage for warranty purposes. Your statement was the engine is going to use oil which is incorrect. I am just thinking of people watching this video who are on the fence about buying this product. They may not purchase one now knowing it going to use oil. I have a 2020 model 3 liter diesel and it does not use any oil between oil changes. My oil change interval is 5,000 miles. Also I have a 2020 3 liter diesel engine manual which shows correct way to check the oil. Not sure what the newer models have or if they even have engine manuals?

That baby rides rough seats are hard,try the ford judge for yourself.Havent sit in Tundra

If you are trading in a 1975 Chevy Vega then you will know that oil consumption is "normal". GM started the latest "normal consumption" story to try and hide the consumption of the Eco Tech 2.4 l in 2010 Equinox/Terrain and similar SUVs. This engine was originally supposed to use conventional oil but they hurriedly changed the manuals and specifications to synthetic mid-year. This didn't help and complaints and engine failures continued through the 2013 model year. There were several recalls and class action suits over oil consumption in the 2.4. It might be normal for the 3.0 to consume oil but GM has lost all credibility with previous attempts to hide underlying problems.

I'm a believer that oil loss on a new broke-in engine is not the norm. All these auto manufacturers are doing everything they can to increase fuel mileage. At best their predictions for mileage numbers are mostly a joke when it comes to real world driving. The fact that most companies are using these low tension rings for horsepower and fuel mileage is futile. One the horsepower would only be slightly noticeable on a dyno and not felt by the seat of your pants. The fact that oil is going out the tailpipe adds up to a huge problem with carbon build up in the combustion chamber and downstream emissions equipment. Take the vvt system and or fuel management systems. They present numerous problems and for what trips to the dealership for repairs with the same crap that failed in the first place.

👑 you the man! Sounds like some good, but bad info. A must know stuff.

As I listen to this on the oil - thinking about ALL the things you had to find out yourself on your Tundra, maybe the owners manual needs to be 2 parts: the initial - need to know and then the rest - need to know over time. Something.... because when you look at all the vehicles with pretty thick books with each car - they are not getting into peoples hands necessary info.