Well BTU's are heat/power, it has to come from somewhere, we know the approx mass of the engine assembly, it's reported 30F hotter, we should be able to back of the napkin figure out the HP that should be gained by the reduction of new engine break in friction causing heat gain, and see if motor improves its HP output on the first 500? miles break in. If Hp does not go up proportionally, everything else being equal, myth busted IMO.

1 btu/h = 0.00039 hp

Last edited by jcc; 01/27/21 11:01 AM.
Reality check, that half the population is smarter then 50% of the people and it's a constantly contested fact.