Best oil to use in a jeep xj 

Hello, Jeepers My 1994 Cherokee sport which I've owned for the last 14 years, since 175,000 miles. It now has 391,000 miles and is running strong. As a mechanic, I changed the timing chain kit and front seal, at one of the water pump changes was 275,000. I baby my jeep and plan to go past 500,000 miles. I have refurbed complete steering linkages. with the insane prices of new vehicles, I may keep it to 1,000,000 miles. I use Rotella oil always.

Been running Rotella for 15 years in my 4.0, 210k

I have two 94 XJ's, have had one for 21 years, it has 290k, the other has 370k miles. I've heard rotella is the best oil to use. I've always used whatever I can afford, but am very faithful in keeping low miles between changes. Good maintenance most important

5w40 T-6 In the winter, 10-40 T5 in the summer. Been doing that in Northern Midwest for the last 4 years no issues.

Rotella is the way to go if you own a Jeep 4.0......

I've got a '99 Classic and a '00 Sport. Both are over 200k and both get Rotella T4 10w30 + Mopar MO-090 filter every 3k miles. They are road tractors that run like sewing machines.

Been running rotella for years it's great stuff. I use a bottle of Lucas to top it off

STP High mile 10w 30, going 230,000 I have no doubt this stuff saved my 4.0 and boosted its life. When I first got it the valves sounded like a 7.3 and had small timing noise, after my first oil change with it a year ago sounds like it just stepped out of the factory, the only problem I have with it is that for high mile oil it only lasts about 5k.

Valvoline MaxLife 10W-30. Can also be found at most Dollar General locations. I too use a K&N oil filter.

When I bought my XJ the previous owner ran Penzoil 5-30 regular the 4.0 had alot of racket I changed it to Castrol GTX 10-30 high mileage been using Castrol GTX high mileage for 6 years since it had 168,000 now its at 248,000 running strong no racket or knocking

thanks just got a 95 xj and was confused but thanks for clearing it up

i’ve been running valvoline maxlife high mileage. I think it’s great but i truly believe the oil in our 4.0s doesn’t matter as long as you use a good oil filter and if you have low oil pressure always use a lucas

MOBIL 1 FULL SYNTHETIC!👍👍👍👍

If someone wants to stick with the 10W30 weight from the manaul they Make a Rotella T4 10W30. Tractor Supply carries it for about 13ish dollars a Gallon. Any HD diesel oil should still retain higher levels of ZDDP. Wal Mart's Super Tech HD Diesel Oil (15w40) has a nice additive package as well. I run regular oil analysis and have tried different HD diesel oils and Rotella and Super Tech have so far had the highest levels of ZDDP. Mobil Delvac has had the lowest so far with Zinc levels of 889 PPM and Phosphorus levels of 659ppm. Supertech 1089 and 898. Rotella T (10w30 and 15w40 were about the same) 1109 and 930. I ran some Delo at some point but can't find an oil analysis in my records for it right now. Edit-these numbers are from oil analysis on used samples not new oil.

This is the best information I seen. Thank you

I used ROTELLA 10-30

Good content. Some OHC engines of early generation you need high zinc oils. Oild VW and Datsuns for example.

love your content. Youd be great for a podcast!

I'm just glad the ford 300 and the 98 xj I just got can share the same filter. FL1A.

I'm use Castrol GTX 15w40 in Mexico city , altitude, heat and traffic, the shitbox works well

I was using the adaptive from stp at AutoZone about a year or so and, my catalytic converter just failed. The year and a half before, I was using GTX . I don't know what my buddy used but, he had her for years , so must be a coincidence. Otherwise people would notice the direct correlation after 2nd application. Thx Ronnie

Rotella T-5 10w30 plus a oz of Lucus oil treatment in winter, Rotella T-5 10w40 in summer with 2-3 oz of Lucus oil treatment. I’ve never blown up a motor.

Hey I live in wv, just bought my second xj 97

Penzoil platinum full synthetic 10w30 is what I’ve used the last 3 oil changes love it! Going to try the penzoil ultra and the full synthetic high mileage see if I can tell any difference. I should probably use high mileage since I’m at 208k and wix filter is your best bet 👍🏾 or since my Jeep came with a box of mopar filters I’m using those up for now

Love me my rotella dino squeezins. Buy 5w30 by the pail at the ol' Wally mart. Cheapest pails I've found. And yeah, run it in every thing.

Great video

Great video just purchased a 2001 cherokee 4.0 120k miles doing oil n filter this weekend going to use rotella im sold or what do you prefer

Hello, I am from Colombia, rotella is not available, we have rimula r4 shell, it is the same it serves me, thanks for your attention, greetings from Colombia

5qts 20w50 Castrol 1qt Lucas but I live in the deep south. Change at 2000 m

I use synthetic oil with zinc in it with a synthetic oil filter and it runs smoother than the oil plus zinc additive and regular filter but it's very expensive to buy but worth it imo

I use rotella t5 10-30 with Mobil filter

I use VR1 1 quart in my oil but I'm also have a new motor. Never use synthetic in a 89 jeep. Clearance gaps are to big

That's all I run in anything except my 2015 silverado, run it in my xj, my 06 yz450f that somehow hasn't blown a crank yet even thought gh it gets beat like you can't imagine every time it gets ridden, and rotella is somewhat cheap

Im not ashamed to say i've been running whatever's on sale for the last 8 years. ,Rotella,Penzoil,Castrol,Supertech. Project Farm Recently,did a video on STP and Lucas..both of which are just thickening agents,no nutritional value for the engine .Heres the one for STP. ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-mqiUFklL_XI.html .... Skip to 10:50 for the analysis,the Supertech oil has MORE zinc in it,haha.

The Jeep 4.0 will run forever with no oil, a couple broken rods and a hole in the block

Im currently using the penzoil platinum 10w30 and I am having nothing but issues with it. I even added a zddp additive. I will never use it again.

My advice, stay with a good brand of oil and use same octainage gasoline, I'm not an expert, 10-40 Pensoil STP oil treatment, 1992 GMC, 210k, 2000 Grand Cherokee 230k, 1999 Expedition 270k, consistant on my oil changes and I'm a slow driver !!!

hello! I have an XJ 4.0 sport with 186 thousand km...what is the ideal oil model to use? At the moment I use 20w50 valvoline...I'm from RJ Brazil. Thank you in advance for the information

I run strictly Rotella 15w-40 on my 01 XJ.

Rotella is good. But zinc levels are diminishing because diesels have cats and particulate filters. I always ran penzoil hi milage it has zink additives. That is dwindling because of gov mandates. Hi levels of zink will mess up o2 sensors and cats thats why car manufacturing introduced roller cams. The 4.0 stopped in early 2000's to the V6 with roller cam. Comp cams sell zink additive in pints add that to any oil and beware alot of oil is half synthetic.which is for late model tite clearance engines.

I use Amsoil Z-Rod 10w-30.. $9.00 a qt if you buy a membership for $16 a year

Try Amsoil oil it is the best oil out there if you want zinc you can buy that and add it too any oil you want to from Amsoil oil

I got 290,000 still going. Gonna do main and rods soon

The best oil you need must contain zinc in it or your lifters will make noise. Modern oil has on zinc zinc will hurt your cats that is why in the last few years zinc has been taken out of the oil I have been using oil additive Bestline when I change oil it has zinc in it

Any of the 15w40 diesel oils are good to use in the 4.0, I use the Traveler brand from TSC in mine and have had good results when I have had a Blackstone oil analysis done. I use that same oil in my 7.3 Powerstroke, 5.9 Magnum, Yamaha Rhino, lawn mowers and any other small engine with good results in all of them.

.Z-rod zinc level 1440, Amsoil dominator 10-30 zinc level 1575

I am not sure about your qualifications Are you a Master mechanic or a chemist

I have a 2000 Cherokee XJ 4.0. Been using Mobil 1 synthetic 5w30 high mileage. Want to do the switch over to Rotella as it's more affordable and ZINC of course as I did a lot of research on it. Question would you only recommend T4 ? As I've seen others use T5 10w30 and T6. What is your take? Also what is your recommendation for oil filters I use MOPAR MO-090.

Know anything about the levels in the Motorcraft diesel oils? I run the 10-30 in my 2013 F350 and have been running it in the WJ also because of availability. 5qt of the Motorcraft and a bottle of Lucas for the 6th quart.

I buy that 10w30 oil.

If you don't run zinc eventually you will destroy your cam or bottom of lifters as time goes on they are taking the zinc out all the oil I run Lucas zinc adative but then I found that Lucas makes a hot rod and classic car oil with high zinc now for 10 w 30

I've heard that oil with Zinc clogs Catalytic converters...any truth to that. I know cams are more costly, but these days cats can be pretty pricey as well.

NAPA 30 and a pint of STP

Lets be honest these 4.0 engines don't care what you put in them as long as its not synthetic... Buy whats on sale, get a good filter and change it regularly.

So rotella 15/40. Will that work in the northeast in January? Should I find 10/30 for the winter?

My jeep has 175,000 miles. I use high mileage 10w 30, would I have any issues or could I benefit from changing to the Rotella? My jeep does burn oil

Rotella 15w-40 it says it is for Diesel engines I’m confused my 4.0 runs normal gas

Hi Ronnie, just curious, if I were to get Rotella for my 99 xj should I look into getting a different type of oil filter for it or is it ok to use the standard mopar filters? My brother sold it to me and it had a pretty noticeable lifter tap. Now I don’t really make a whole lot of money so I haven’t been able to take it to a shop but I ended up getting a little scared because the check engine light came on and I should have gone to get the code checked but I was nervous to put more miles on it when it came on. Mind you this is my first car. So I got to thinking, my brother did say it needed an oil change, and because of my work schedule it’s been hard to find any time to get it to a shop to get the new filter and oil done properly so during my break I decided to change the oil myself. Well, I failed to look into the fact I needed a special wrench to get the filter out so I just changed the oil and not the filter. But when I went to start her up again the light wasn’t on anymore. So I’m hoping I didn’t end up knocking a sensor loose or anything else because I was trying to see if I could get the filter off by hand but the thing just didn’t move. Any ideas? It would mean a lot I want my xj to last a loooong time.

Amsoil is the best oil period.

I use the Lucas hot rod and classic 10-40 it’s supposed to have 2100 ppm

Wix, Mopar, or K&N filter (or something else) with the rotella 15w-40?

Rotella T4 or T5.

10w60 liquid moly

I live in wv i drive about an hour to work everyday. My 4.0 has 285 xxx on it. Ive been running full synthetic. So 15w40 rotella would be better ?

Valveline vr1 20w50

Can’t buy Rotella in Australia. What else you got?

"K&N" Less filtering equals more power.

How often do u do oil changes

Is it safe to run that Rotella oil 10w-40 on a 97 XJ, 5 speed manual transmission... I'm located in southern California... not sure if location matters

my jeep used to run hot, i blew my head gasket and had the head replaced. would having the thicker oil cause higher temps? im sitting around 190k right now

Amsoil ZRod has high zinc for your flat tappet cam engine. The 4.0 and 4.2L were designed to run 10W30 motor oil and viscosity matters as does the PPM of Zinc. Yes, Amsoil is a full synthetic but it has the PPM of Zinc needed in the right weight the engine was designed for AND you can run their synthetic longer than the Rotella. You will cause serious additional wear to the bearings and valve train every time you start your engine, slower oil drain to the sump, 2 or 3 degrees more heat because that oil was not formulated with your 4.0 or 4.2 in mind… sure it’ll run it.., but your engine will wear the components mentioned above.

I run 15w 40 rotella diesel oil 😂 in my 89 wagoneer cherokee