Thought this might be interesting to some of you car freaks. I know I'm not the only one running GC... If this is true, it may be easier for some folks to get.

Today I emailed Castrol asking them if the Edge was better than the European SYNTEC. They sent me a generic response that said its better than any leading synthetic, "including Mobil 1 by 8x". I replied saying I didnt care about Mobil 1, I was curious if I should switch from the European SYNTEC. I basically got the same response again, I emailed back, but they are closed now.

Castrol rep. I actually pulled this response from a benz forum, but it was almost word for word what they sent me twice.

I am working with Castrol to promote Castrol EDGE and I think it is a wonderful product. Just to let you know, Castrol EDGE and Castrol SYNTEC are different formulas. Castrol EDGE contains different base oils, including PAO (polyalphaolefins), which helps Castrol EDGE meet the GM4718M specification. Castrol EDGE provides guaranteed extended drain interval protection for up to 15,000 miles, or one year, whichever comes first.* Finally, Castrol EDGE provides unsurpassed engine wear protection that no leading synthetic oil can beat.**

*Guarantee excludes severe service applications such as frequent towing and hauling, racing, dirty conditions and extreme idling. If your vehicle is covered by a warranty, follow your car manufacturer’s recommended oil change/service intervals, which can be found in your owner’s manual
**5W-30s tested in industry standard sequence IVA wear test

So I guess the question is, does the GC 0-30 have any polyalphaolefins?

http://www.bobistheoilguy.com/forums...&Number=718643

http://www.bobistheoilguy.com/forums...Number=1355428

The new GC?

 

I guess I'm a bigger nerd than I thought