Ash content corrolations to Pre-Ignition

[Signal 2]

All interesting reading...thanks to VEX and all contributors. My head's spinning since I'm just a dumb goverment employee.

My question is that in the F I models, how well or poor the oil burns is only half the equation. How it performs in the high heat and extreme rpm turbo enviroment is the other. For that, it seems synthetic is superior. Is there something to look for in the analysis/content charts that would help a chemistry challenged lay-person balance those needs?

[vex]

Originally Posted by Signal 2

All interesting reading...thanks to VEX and all contributors. My head's spinning since I'm just a dumb goverment employee.

My question is that in the F I models, how well or poor the oil burns is only half the equation. How it performs in the high heat and extreme rpm turbo enviroment is the other. For that, it seems synthetic is superior. Is there something to look for in the analysis/content charts that would help a chemistry challenged lay-person balance those needs?

One would think. The trouble with our cars however is that even naturally aspirated we need rather good oil. There should be no difference in the oil you use from a turbo car from an NA car.

You're still looking for the base materials to be extremely low. IE: Calcium. The lower the ppm (parts per million) the better, while additives like zinc, and some detergents will prove beneficial so long as there's not too much. Especially if the car is turbo, which would lead to a fair amount of foaming. I'm trying to find some VR1 oil that was mentioned, but so far my searching has returned nill.

[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.