Just registered, I have been looking at the site for a week or so... I am impressed, and somewhat intimidated at the same time. You folks sure know alot about motor oils! I think I might have been bitten by the same bug you have because I have been almost obsessive about oil in my vehicles the past several months... I change the oil on all 6 of my vehicles (5 drivers)primarily to save money, but also enjoy it as a hobby and like that it is done correctly. Anyway, I also have a tractor and heard about this site over at Tractorbynet, and I frequent that for my tractor needs, but the lubrication section is limited and generally just on diesel oil. I was just looking for some feedback on Mobil Drive Clean and Exxon SuperFlo "as you call them Dino" oils. I have used a number of diffenent oils, Citgo, Quaker State, and have looked at some of the archived info but wanted to have a more detailed look at these. I know many of you are very much into synthetic's, straight or blend, extended drains, and oil testing... That's a bit beyond me at this point so hopefully you won't mind stepping back a bit for a newbie like me.... If you can keep it somewhat basic, that would be helpful.. kind of oil "101" so to speak. I currently change the oil every 3000 miles or sooner, use WIX, Purolator and Baldwin Filters, Use 5W30 in most of the vehicles... Thanks...