I agree with what a lot of you airplane guys say but you have to keep in mind that car and truck engines turn up to 3 or so times the RPM that airplane engines do. Correct me if I am wrong. Yes no matter what the instructions that come with my motors say I heat cycle them on break in and agree this is the best way. As far as checking temperature I feel this is a good idea as tuning by ear is OK but to cold or to hot is departmental to the well being of the engine. So checking Temperature does not hurt.
