Change Your Duramax Diesel 3.0L LZ0 Engine Oil & Filter 

I wouldn’t worry about flushing the little bit of oil out after it drains. Have a 2021 LM2 with 47k miles and only used amsoil. The oil will be just as black at 500 miles as it is at 6500 when you change it. Diesels are dirty. I will say every few tanks of gas it’s worth it to throw in some amsoil all in one, hot shots edc, or archoil fuel treatment. You’ll notice a difference in how it runs.

I agree 100%, I have JT 2020 and change is every 4,000 miles with Amsoil. Im at 87,000K never had issue and engine running great. Im looking to trade it in and upgrade to ZR2 LZO. Question: Like said oil cheap. Is it worth it to change Oil out right after I buy it and replace it with Amsoil. Will this give the seals and break in better minerals and break in then Factory Oil?

The 3.0 takes 7 quarts. You should put 7 quarts in it. An accurate reading = warm, on a level surface, engine off after ~5 minutes to drain down, and then check the stick. A quart over likely isn't going to hurt anything, but it's throwing money away for no reason. Yes, GM overfills a quart at the factory because it uses a bit for about the first 2k miles as the rings seat. The engines get the necessary break-in hours on them before ever seeing a chassis. Take it off the lot, check at 500mi, recheck 1kmi, recheck 2kmi, and then get the free dealer change at 5k. And then EVERY 5k or 20% and no more. Playing the 7500mi or 0% game is dancing with the devil. The tolerances in these things are very tight. Be nice to them and they'll be reliable. And that's not real specific to the 3.0. Pretty much all of these newer engines running these thin oils need the same diligence in maintenance. Doesn't matter if you use Amsoil, Mobil1, etc or the standard ACdelco. Run whatever you want that meets or exceeds Dexos spec and be religious about the proper interval, because both of those things are required for a successful powertrain warranty claim. GM will do everything possible to get out of warranty liability, so keep good records and receipts if you change your own oil.

Make sure you take DEF fluid with you. I just had an issue with my 2024 ZR2 3.0 and had to stop every 125 miles and add a gal to keep it from shutting down on me. Had to have it reprogrammed when I got back to SLC sensor was not reading correctly. This only happened when I was towing.

Wix 👌

What does your oil pressure run? Mine only ever runs about 30psi since brand new

Do you know if 2024 Yukon has LZO in it ? Or still got the older one ? I know pickups has the new 305 hp LZO

Ive been using oem oil for 3 years. I want to make the switch over to amsoil on my next oil change. Do i need to do an engine flush first or can i just straight up switch it over without problems?

Nice truck. Do you have any blow by on lzo?

Do you have a fuel filter on your Duramax.

Your book tells you to wait a bit for the oil to drain into the pan before checking it.

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