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-   -   1995 Wrangler YJ 4.0i - which engine oil? (http://www.wranglerforum.com/f218/1995-wrangler-yj-4-0i-which-engine-oil-146922.html)

jonnyboyo 03-17-2012 11:45 AM

1995 Wrangler YJ 4.0i - which engine oil?
 
I can't find my handbook , what viscosity do I need for a 4.0i from 1995?

Thanks very much

Master4th 03-17-2012 12:11 PM

10w30 or 5w30 depending on climate.
http://i1246.photobucket.com/albums/...317_130532.jpg

The Toolman 03-17-2012 02:11 PM

Awesome reference Master4th :thumb:

Brand wise, I just tried Royal Purple in mine. With the same weight motor oil as I was running before, there is a 10-15 psi increase in oil pressure. Runs smoother too, very pleased.

Master4th 03-17-2012 06:11 PM

Quote:

Originally Posted by The Toolman (Post 2150391)
Awesome reference Master4th :thumb:

Brand wise, I just tried Royal Purple in mine. With the same weight motor oil as I was running before, there is a 10-15 psi increase in oil pressure. Runs smoother too, very pleased.

I only use Royal Purple Lubricants, Diffs, Transfercase Trans everything. I gained 2mpg just by doing the diffs and trans. Less drag from turning gears equals more gas mileage!

Ibuildembig 03-17-2012 06:14 PM

I wont ever run syn in my axles, currie did a study saying it actually increased tempuratures in the housing and my buddy who does diffs for a living won't warranty anything that has run in it.

But I do use RP Max-EX p/s fluid

DirtyRob 03-17-2012 10:03 PM

I always run Rotella in my 4.0's.


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