[nonsensez9]

Originally Posted by FoMoCo

Motor oils typically are 75-85% basestock with the balance being additives. That’s why basestock quality is such a critical contributor to the performance of the final blended product. There are four different types of base stock used in the motor oil market today.
Group 1 - Conventional - Mineral oil derived from crude oil
Group 2 - Hydroprocessed - Highly refined mineral oil
Group 3 – Severe hydroprocessed - Ultra refined mineral oil
Group 4 – Full synthetics (chemically derived) - Chemically built Polyalphaolefins (PAO).

is M1 a 3 or a 4?

[Tominator]

Funny though how those "independant tests" are only ever found on AMSOIL-sponsored websites though.

http://www.bobistheoilguy.com/

As the old saying goes, read'em and weep!:thumbsup

Mobil One is a PAO certified FULL synthetic and only tests slightly behind the industry leader.....

[65sohc]

Here is an interesting synthetic. You change it every 5 years or 50,000 miles and they warranty the engine for 10 years or 300,000 miles against any oil related failure, including piston ring wear. They also manufacturer permanent coolant, among other products.

http://www.synlube.com/serv01.htm

[Zenmervolt]

Originally Posted by Tominator

http://www.bobistheoilguy.com/

As the old saying goes, read'em and weep!:thumbsup

Aside from some hearsay in the forums and links to AMSOIL-sponsored sites, I can't find any links on that site to independant, non-AMSOIL-sponsored analysis. I did, however, find instances of blatant lies spread by AMSOIL dealers and see AMSOIL's corporate back-pedaling as they condemed the dealer but steadfastly refused to take any action against the dealer. (http://theoildrop.server101.com/ubb/...=014279#000000) Try again.

To 65sohc: A warranty is only as good as the company behind it. There's no way a company that is using a generic FrontPage template for its website is going to be able to honor that 10 year, 300,000 mile warranty.

[jjgt06]

ford says use synthetic always in your 05-06 stang