What brand of oil was it?
Hey Beaver, as far as the Pennzoil goes, for years Pennzoil has been proven to cause engine sludge, it also doesnt protect very well against thermal breakdown. Through vehicle testing and development, I have found that Valvoline or any Ashland produced oil is the best as far as performance and durability of the oil itself is concerned. Surprisingly enough, Chevron oil has also produced some good results. Although I still like using Valvoline. I found out last weekend that Napa brand motor oil is generically packaged Valvoline, also the GM Goodwrench oil from the quick lube at the GM garage is Valvoline in Goodwrench bottles. Thats my 2 cents on motor oil.
