Engine 1: I paid someone to idle 1 gallon of fuel through it keeping the temps at 200 because I was out of town for work and needed it to be ready to race that weekend.

Engine 2: I idled 5 tanks through it and put it on the ground and started doing the heat cycle method.

Engine 3: The back up engine was broken in on the box and put back in the box after 1 gallon of fuel.

All the engines perform the same and I have raced the hell out of them since they came out even running engine one 7 straight weeks with no issues.