__________________
RIP: 80 300SD
RIP: 79 450SEL
2002 E430 4matic (212,000km)
2002 ML500 'sport'

____________________________
FACEBOOK: PANZER450

Amsoil is great but I had to jump through hoops just to get 1 filter from them.

The question is partly opinion and partly fact.

You've posted two oils that are Group IV synthetics (Mobil-1 and Amsoil) and one oil that's a Group III synthetic (Shell).

So, clearly, the Group IV synthetics are "better" oils. Whether they will provide greater longevity for your engine if you change the oil every 5K is a completely different discussion.

There is nobody on this forum, AFAIK, that has specific knowledge of the differences between Amsoil and M-1 and can make an educated judgment between them. The only factor that may weigh in Mobil's favor is the API certification.

BTW, because of the format of the question, I was unable to vote in your poll because the differences between M-1 and Amsoil are not immediately obvious to me.

Brian.......for the same reason as you not being able to vote...I went ahead and voted "None of the above".....

Really....for most peoples use....any oil changed regularly is enough....IMHO....but that and $4.50 will get you a good latte....

__________________
1998 W202 C230 - The money pit of late.
1984 W126 300SD (356,800 miles) Gone to the wrenchapart
1984 W123 300D Gone to the wrenchapart
1972 W108 280SE 3.5 (sold but not forgotten)
1986 Buick Grand National 3.8l Turbo (86k miles)
1966 Glassic Model 'A' Replica http://www.glassicannex.org

http://banners.wunderground.com/weat...Round_Rock.gif