sHerm, I'm jeolous and might take a ride to fla. just to shop at big lots...they just bumped the price at auto zone from 3.29 to 3.99 here for the stuff. I've run it to 6k with no problem, used motorcraft, wix and mobil1 oil filters with equally good results. The specs on it are pretty awesome...with a flash of over 490 on the 10w30. For the price I haven't found anything yet to beat it. Although I am curious on just how long I can safely keep it in the engine, since no one seems to have a valid anwer guess I'll just have to break down and do a uoa. Mikep I am not that versed in proper interpretation of msds but I'll give it a peek first chance I get thanks.