I know this question seems to be asked a lot, and i know the answer tends to be that it depends on the car. But there must be one oil (street formula that can be bought by the average consumer, no exotic racing oils) that seems to shine above the rest. I know redline claims this a lot in their ads and so do amsoil and mobil 1, but there myst be one that seems to produce better results than the others more often than not. By the way this question is asked without concern to price, i dont care if the oil is $25 a quart, if its good. From reading on here though i would say the there seems to be somewhat of a concensus that Redline would be right near the top (if not the top) followed by amsoil, mobil one and royal purple. what do you guys think?