Originally Posted by TXLapDog
Wow, this is all really good to know! Let's see here, I have about 125,000 miles on my Audi A6 and have used regular since day one. So by your calculations I am overdue for 2.5 engine rebuilds!
Or is this just a Crossfire characteristic?
Hey, everybody understands that Audi is below MB in the pecking order on the autobahn. Maybe that is why you can get away with using low octane gas. Either that or Audi has a superior engine management system, which I highly doubt. The Mercs are pretty sophisticated.