Originally Posted by Kidnova

Yep. The wife prefers synthetic ... less friction :drink:

Originally Posted by Hydrocruiser

15W-50 pumps like a 10w...use it when it gets cold. V-twin is good down to 50*F. Much like a straight 40wt.

Originally Posted by Hydrocruiser

15W-50 pumps like a 10w...use it when it gets cold. V-twin is good down to 50*F. Much like a straight 40wt.

Originally Posted by sleeper_dave

BTW, you can get the ° symbol by holding alt and pressing 0176. Or run "charmap" and insert it from there.

How do you determine what temp a particular weight oil is good down to?

Originally Posted by Wobble

That sucks, They did say that the 10w40 and 20w50 vtwin motorcycle oils are still full synthetic. I switched from the 15w50 to vtwin when they reformulated for emissions over a year ago, didn't realize they had cut the synthetic content also.

Originally Posted by Rage

Does this mean that with the exception of the noted 10w40 and 20w50 vtwin motorcycle oils all the Mobile1 oils are in effect "blends" of synthetic and petroleum base stocks?

Originally Posted by o2man98

It seems that GC testing has shown the M1 EP 5w-30 and 15w-50, so far, to be mostly GRP 3 basestocks.

Originally Posted by o2man98

It seems that GC testing has shown the M1 EP 5w-30 and 15w-50, so far, to be mostly GRP 3 basestocks.

Originally Posted by Hydrocruiser

This was posted on a site that tests synthetic oils:

Ever since Mobil lost their lawsuit against Castrol (they objected to the fact that Castrol "synth" was made from Group III base stock instead of being truly synthesized), and the court decided that the word "synthetic" was related to oil performace, not exactly how it was made, most manufacturers of "synthetic" oils switched to using Group III base. Mobil 1 was one of the last holdouts.