RE: whats the best break in method
I do not break in the engines for car use. I just run them under load and not exceed 1/2 throttle for 10 tanks. I have a Traxxas 2.5R that has 15 gallons of Omega 15% fuel run through it and counting. All this "heat cycling" of the engine is a ridiculous waste of time. The only time I will heat cycle an engine is if it has a Meehanite piston running in a steel liner. This will allow the piston growth to stabilize. I have several TRX 2.5's, an OS .18 and a HPI (toki) 3cc engine and I have given them all the same treatment and all are performing well. My 2.5R with 15 gallons and counting has no pinch now but I still can run out a full tank on my T-Maxx without the engine stopping. Don't worry about break in, just avoid over lean conditions and don't exceed 1/2 throttle for at least 10 full tanks of fuel. true ABC engines use a high silicon content aluminum piston which is a low expansion alloy.