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I bought my truck from an idiot that used Penzoil and some white, non labeled junk filters. I switched it over at 114K. i'm at 121K. NO problems yet.


I'm not that quick to dis the Penzoil. the '91 2wd that I bought had 279,000(now 284,an change) on it an all the prev owner did was change the oil an filter every 3000 with Penzoil an generic filters. I switched to valvoline(as Darin states"top choice of machanics"or that's what it says on the bottle, hehe) 10w/30 just because I buy the stuff by the case(now four car/truck owner). I also switched to the fram ph8a filter for more filter surface, so far no probs...........Karl