high milage? oil?
Thread Starter
Newbie
Joined: Mar 2010
Posts: 26
Likes: 0
From: Santa Fe, NM
Year: 1992
Model: Cherokee
Engine: 6cyl 4.0
high milage? oil?
my cherokee has almost 250k on it. someone told me i could run thicker oil than what your supposed to from the factory. is this true? what kind of oil can i use? it doesnt burn oil..but it does has a bit of a rear main seal leak. does anyone know about this? what kind of oil are you guys using?
thanks
thanks
CF Veteran
Joined: Feb 2010
Posts: 12,367
Likes: 23
From: Oroville, CA
Year: 1995
Model: Grand Cherokee
Engine: 4.0 with all of the noise and clatter
Just keep running what you have always run. Going thicker can do more harm than good. I would not go any thicker than 10w40. There are a few brands that are suposed to help soften the seals and help with oil leaks, it may help the rear main.
CF Veteran
Joined: Nov 2009
Posts: 8,172
Likes: 17
From: The Republic of TEXAS
Year: 1998
Model: Cherokee
Engine: 4.0L HO
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