The majority of "we car guys" advocate braking in a car engine at IDLE for several tanks before running it. I personally disagree with that method and prefer to get an ABC engine HOT by breaking it in at WOT in a large area where the car can get a straight line run at full throttle for a minute and allowed to cool a little with low throttle operating and then back out on the straightaway for several tanks. The car is run in a 2 stroke rich mode and after several tanks leaned out so WOT produces a maximum temp of about 270 degrees for extended non-stop operation.

My engines last over 5-6 years (oldest one has at least 250 hours on it in the past 5 years and still runs great), not 5-6 gallons. And yes, this part time car guy uses AIRPLANE fuel in his engines because the higher oil content will extend the engine's life considerably.