[DieselDiner]

Originally Posted by efdiesel3s

well by virtue of viscosity index total has the highest at 167. 166 motul, 164 mobil 1 esp, 157 amsoil european car formula.
http://www.amsoil.com/shop/by-produc...?code=AELQT-EA it says LL04

the thicker amsoil at 5w40 has a 171 viscosity index.

The Pennzoil product I linked earlier in the thread has a VI of 178 (one of the reasons I chose it). The current date sheet doesn't quote the VI, but I have it from an earlier data sheet.

[Cobra0963]

Originally Posted by efdiesel3s

if you use the product finder on motul it'll show you that the Motul LL-04 Specific is the best. http://www.motul.com/system/product_...pdf?1323967432

does anyone know if there is are advantages and disadvantages from using 5w30 to 5w40?

Ok......I choose Amsoil because of its superb wear protection and resitance to breakdown....not to mention ive used it in several vehicles with great results. The viscosity debate has me a little baffled....dosent the vehicle produce more HP and less fuel consumption with lower viscosity weight oils?

[PSEE]

So...

Why doesn't Amsoil obtain the BMW LL-04 rating?!?!?



I mean, if it's superior to the other LL-04 rated oils and all that...

[Socom]

Originally Posted by PSEE

So...

Why doesn't Amsoil obtain the BMW LL-04 rating?!?!?



I mean, if it's superior to the other LL-04 rated oils and all that...

Because of their size spending the couple of hundred thousand dollars would eat any any profit? Exxon PAO isn't cheap.