[Mike Hedger]

I run top lube and have had the engine apart after every season (about 300 runs each) and have 4 years on the pistons and block two of them on alcohol. But I also change the oil every other race, gas ported the pistons and run a low tension ring that is made to run alcohol. I also have freshened about 4 alcohol motors and as long as they run top lube and don't flood them when they crank them to wash all of the oil off the cyl walls they are OK. I have had in the past seen the wear you are talking about but they did not run top lube in the fuel.