Shell Rotella T6...Most believe this to be the best oil for the xj 4.0. WOW, some of you guys have racked up of serious miles! I guess mine is still a baby at 128,807, guess she has lots of life to live

 

I have over 252 thousand miles on my 90 xj and I use cheap Kragens (oriellys) 10-40. I cant be the only one using the cheap stuff. The weather is decent year round though in northern California

 

More important to use GOOD filter.

 

I would not use the 15W40 T5 in the winter.

T6 (5W40) is far better suited since it provides the least amount of wear on the engine components at cold startup

 

^^^^^^^^^^ What Dukie said.. I run 5w40 T6 in the 2000 all year long up here in Alaska.

 

I have used T65w40 for 100k currently at 210k and runs like a sewing machine and I still don't leak oil externally.

 

Also the t6 Rotella is pretty cheap compared to mobile 1 and royal purple. Someone on here actually did a lot of research on the different oils and by the numbers and facts, t6 or t5 is the best oil for our 4.0s.

Edit: it was salad. I read the whole thread, very interesting and informative. Sorry I don't have the link to it. Every oil post that comes up should just be referred to his post.

 

Salad's write up
https://www.cherokeeforum.com/f2/rot...essing-188168/

 

I love how these threads just rise from the dead

 

It's always fun. Maybe if we just keep looping back to your thread then they'll stop? Haha

 

I recently got a reman 4.0 to replace the blown up one in my jeep, I'm just wondering if anyone recommends a good brand?

 

Salad, Thank You Greatly.

​​​​​​​Just excellent.

 

I recently just bought a 2015 Jeep Grand Cherokee Overland 5.7L and was curious what brand of oil would be best to use. I used to drive a Ford F-250 V8 and I used MotorCraft because it was ford made and my engine seemed to liked it better than anything else. Any suggestions?