Contour Enthusiasts Group Archives Forums Modifications Duratec Performance From Castrol...Re Syntec

John Coffey wrote:
"Also, Consumer Reports recently did one of the more definitive tests on engine oils and their determination was that
ANY full SFI rated oil works well. The only real difference between regular oil and synthetic oil is synthetic oil's ability to handle higher heat loads. So, unless you are doing something that gets your oil temps about 240 degrees, ANY fully rated SFI oil will work fine in your Contour."

Sure it works fine, but synthetic does work better. I had sludge buildup in my V6 after 25K miles of dino oil. I know because it all came out after I switched to Mobil 1.

Whenver I use Castrol GTX, it comes out slightly goopy after 3K miles, Mobil 1 always flows out just as thin as it went in.

-Lance