Quote:
Originally Posted by droopey
TC, Do you mean if you use synthetic after using conventional oil.
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Yeah... that's what I meant.
Good info jfrabat! There was a several page long thread on this a few years ago here on Jeepz, and no one brought that up.
That makes sense, but the part I do not understand is why would it cause leaks after high mileage but not when used on a low mileage or newer engine? Possibly because the gaskets have been partially worn and permeated with the the old oil? Also, if you have a 10W30 oil how would that be heavier or lighter than 10W30 oil that is synthetic? Isn't the weight the same? I know I used the same weight blended oil on the 92...
Sorry for all the ??? but I'd love to figure this stuff out.
I would not want to put anything other than the recommended viscosity in my '05, for warranty reasons.