Originally Posted By: Chris71
Like I said before, even if they do, it's the Mobil 1 R that you can't buy off the shelf. I would contact various engine builders in order to find out what they really use. Team Penske would be one of various teams who would use it.
The Mobil oil used might be much like the M1R product that you can't buy at all now. One of the dumbest things they ever did. A great product with a high price and very limited distribution.
Glad I stocked up when I could still find it.