I think Fred remembers too much of the ads he sees on the TV!
Actually all we have to go on about different oils is the ads the different oil companys throw at us daily...or hourly in some cases. Them companys can SAY anything they wish to convert us over to their oil. How do we really know what difference there is between their oil and what is in our engine NOW?
Some companys even resort to giving away oil to be placed in new cars...such as corvettes and cadilliacs.. thinking we will think THAT oil is better stuff because it is in the high priced vehicles..
Don't be mislead by the ads.. oil is oil! Any chemicals included in the oil are in such minimal proportions that they hardly matter at all.
Big JIm <img src="/forums/images/graemlins/pfft.gif" alt="" />