Ash content corrolations to Pre-Ignition

[Signal 2]

My local ADVANCE AUTO only carries it in 20w-50 as well.

Originally Posted by vex

......There should be no difference in the oil you use from a turbo car from an NA car.....

I don't understand. Aren't synthetic's generally more resistant to shear and coking? And isn't this a concern with the extreme rpm and heat of turbos?

[vex]

Originally Posted by Signal 2

My local ADVANCE AUTO only carries it in 20w-50 as well.


I don't understand. Aren't synthetic's generally more resistant to shear and coking? And isn't this a concern with the extreme rpm and heat of turbos?

The benefit of synthetic over conventional is the base they use. On the previous pages compare what is known as synthetic to good grades of conventional such as VR1. You could have a "good" synthetic with worse qualities for our engines than a top rated conventional. Drawing generalities across the board will cause trouble for people.

If you however compare VR1 to an oil like royal purple would you see a difference, I don't know. I don't know the UOA or the VOA's of the two.