jeffhatch

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

2heapjeeps

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

EZEARL

More important to use GOOD filter.

dukie564

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

Dumajones

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

SiRed91

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

rklettke

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.

NewbJeep

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

salad

I love how these threads just rise from the dead

rklettke

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

stacciii

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?

'00 XJ

Salad, Thank You Greatly.

​​​​​​​Just excellent.

Kimberly Tumlin

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?