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  1. sebastian323

    Thicker oil I can run in my 1996 4.0 OHV

    I am currently running 10-40 in my 1996 4.0 OHV. I am wondering what is a good thick oil I can run for engine longevity. I rarely use my truck and when I do use it is to go to the junkyard to pickup parts about 2 miles from my home or to rip around on dirt roads, so I do not care about fuel...

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