Simply put race oils are not blended for the long OCIs.. The difference could be something such as the choice of ester (easily oxidized by water generated by short tripping) and the ability to neutralize acids over time. The choice of VII could be another.Ohkay....
According to BITOG, i should use a Diesel Truck Oil in a gasoline Car or even Motorcyle, wich is O.K. Dont care about the approvals.
But...
Using a High-performance Gasoline Racing oil designed for cars in a car on the street is a no-no. Because it dont carry approvals.
Have i understand it?
My car suffers from cam chain wear. The chain lenghts, then the cam chain tensioner can´t hold tension, and you have a rattling noise.
There was a poll amongst the members in the german forum.
The only two guys wich dont had problems used the Motul 300 V Racing oil for cars, with the extra load of Moly. And the had more milege on the cars as avergae, to. All others used over the shelf oils, PAO, with a lot of approvals, even the porsche A40.
Seems like the oil with the better additive pack protects better, no matter wiche approvals it carrys. Coincidence?
And, the last thing:
If i use a 10w-40 high quality PAO oil in a car wich is driven hard, High RPM, heat, Piston speed and
If i use a 0w-40 high quality PAO oil in a car wich is driven hard, High RPM, heat, Piston speed.
Could it be that the 10w- has a little edge in Protection because the oil film strenght dont rely on VI Improvers?
That´s what i am talking about here. But it looks like nobody understand me or could answer my question.
And yes, Mobil 1 0w-40 is a outstanding, prooven, high quality oil, no doubt.
As for your last part about PAO 10w40 vs 0w40. I suppose it's possible but you'd have to know what type of VII's were used in each product. The ability to respond differs with increases in the number of heat cycles.