Howdy I read on one of the supra forums that it was an OK idea to run 6 quarts of oil in a stock setup. I gave some details on why this was a good idea , something to do with the way the pickup worked if i recall. Anyways I just briefly skimmed the posts and went back to re read it and never found it again. I have run 6 quarts in my car a few times and did not really see or smell anything negative. I once put 5 quarts in my Girlfreinds car and it held 4.5 quarts and it smelled like burnt oil for a week. Anyways Any info would Be Great