how the f do i get engine know after an oil change?

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01-19-2012, 01:14 PM

#61

hawaiian808

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Model: Cherokee

Also if I remember hm m1 is actually a higher blend of "dino oil" than regular because it suspends the additive package better, in am engine with loose tolerances that is important

Visit bob is the oil guy forums and read up on oil

Does it really matter they market a full synth? No not really, it works and keep your oil changes with the top 3 and it will work the way you want it, dino oil worked for decades, it will still work blended,

Last edited by hawaiian808; 01-19-2012 at 01:20 PM.

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01-19-2012, 03:35 PM

#62

irs009

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Year: 2001

Model: Cherokee

Engine: 4.0

The sound recording you posted sounds like a bad bearing that is turned by the serpentine belt.

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01-19-2012, 05:20 PM

#63

jth877

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Year: 1999 Stone White

Model: Cherokee

Engine: 4.0

I hate snake oil. No need for it.

I use a mopar filter and 5w-30 rotella syn. All avialible at walmart and probably cheaper than Napa's dino oil. You need a decent phosphorus/zinc content as well, I don't know offhand what Napa's house brand oil has.

If your lifters are noisy check how tight they are. They should be at 19ft/lb , IIRC.