thicker engine oil
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CF Veteran
Joined: Dec 2008
Posts: 1,533
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From: eaton ohio
Year: 93
Model: Cherokee
Engine: 4.0
my engine is runnin a bit hot on the oil temp and its gettin tired so i wanna get a thicker oil so itll lube up a bit better, does anyone have any suggestions? ive read up on 10w40 and 0w40, any other ideas?
Last edited by UserID6095; Jul 20, 2009 at 06:32 PM.
CF Veteran
Joined: Jul 2009
Posts: 2,158
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From: Chico,ca
Year: 89
Model: Cherokee
Engine: 4.0
I am not sure I know enough to say in regards to which weight to use,I have used some of the additives with good results,like Restore and Lucas,something to consider.
CF Veteran
Joined: Aug 2008
Posts: 6,588
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From: Chico, CA
Year: 1986
Model: Cherokee
Engine: 4.3L with headers and full 3" exhaust system
I use Valvoline Racing 20-50. It is formulated for racing engines that will burn a little oil, no matter how fresh they are. It will absolutely leave no deposits on the plugs no matter how long you run them. I use in all my vehicles and have great oil pressure.
Senior Member

Joined: May 2008
Posts: 817
Likes: 7
From: Michigan
Year: 1996
Model: Cherokee
Engine: 4.0
Im also running 20w50 in my 96, it seems to quiet down the engin a bit too.
CF Veteran
Joined: Aug 2008
Posts: 6,588
Likes: 495
From: Chico, CA
Year: 1986
Model: Cherokee
Engine: 4.3L with headers and full 3" exhaust system
That it does. I also think that it will make the engine last longer. The light oil formulations will work, but they were intended for one major goal - milage. It was one of the little tricks Detroit used to up their milage ratings.
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