JeepForum.com

JeepForum.com (http://www.jeepforum.com/forum/)
-   WJ Grand Cherokee Forum (http://www.jeepforum.com/forum/f310/)
-   -   Should i put 10w-30 or 10w-40 in my 4.0? And also should i use rotella or mobil 1? (http://www.jeepforum.com/forum/f310/should-i-put-10w-30-10w-40-my-4-0-also-should-i-use-rotella-mobil-1-a-1568981/)

Grndcherokeewj 08-30-2013 12:02 AM

Should i put 10w-30 or 10w-40 in my 4.0? And also should i use rotella or mobil 1?
 
Should i use 10w-30 or 10w-40 in my 4.0 and also should i use rotella or mobil 1 high mileage oil?

specia1k 08-30-2013 05:04 AM

I have three JGC's ('98, '02 & '04), and I use Pennzoil High Mileage 10w30, with a FRAM xtra-guard filter, changing oil every 6-8K, and have had no oil related issues. I've found Wal-Mart has the best prices for the oil & filter.

KayCeeJeep 08-30-2013 09:49 AM

Rotella is tried and proven as top notch in the 4.0, Mobil hasn't worked out near as well in that engine. This is based on review of countless UOA's (used oil analysis).

All you "need" for the 4.0 is a good 10w30. You can run thicker but you're not gaining anything but it won't hurt anything either, other the mpg by a tiny amount.

Rotella 10w30 is a very thick 30 grade it's nearly a 40 grade anyway and therefore it's a top choice and just about perfect for the 4.0.


The time now is 07:56 PM.

Powered by vBulletin Version 3.8.4
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.