So many different opinions on this subject. 3 things to do and you can't go wrong, keep the temp up to at least 200 deg(wrap head), keep rpms low(under 18,000) and give it plenty of fuel(oil). Like Monty said use a fuel with xtra oil. I use fuel with 20% nitro and 16% oil for break-in. I'm not a fan of idling tanks through it but some think it's the way to go. I personally have great results with firing it up, throwing it down and running it for 45 min straight in an area where i have smooth flat surface and can transition into a long grassy hill for heat cycling.