I've done it a little different then Josh with excellent results, but it's basically the same concept except I run 3-4 tanks in a row after the initial idle tanks. Let cool, then run another 3-4 tanks, repeat process until you have run total of 15 tanks. It even worked for hard to break-in engines like the early Ninjas. Broke-in an engine the night before qualifying at the Nats...while pitching quarters, had to be there. It still runs flawlessly with great power.