|
Most if not all "sythetic" oil uses a Group 3 base stock. This includes Pen, Valvoline, and regular Mobil 1.
Mobil 1 Extended Performance uses Group 4 true sythetic base stock. But its about teh same price as AMSOIL. M1EP has the edge as it is sold in larger numbers at larger retail centers.
The "german" castrol sytec oil is a Group 4 sythetic oil as well, and is cheaper then M1EP and AMSOIL but hard to find.
AMSOIL is awesome, no doubt.
__________________
2/20/2013: They Day the ****s Stopped
|