ORIGINAL: Da Smak
Also made popular by the number of people complaining that they have killed there engine after 1.5 to 2 gallons. Heat cycling is good for the pro racer but for the weekend warrior, the slow idle method works best and is far easier on the neighbours ears.
You have that backwards---the idle method kills pinch and engines in 2 gallons b/c it breaks that tight seal when the engine is all cold.
The "bess" or Paris method makes engines last longer because you're actually getting it up to temperatures (200F) during break in, and fitting the piston/sleeve together at the proper temps.
Idling is good for the pro racer who wants to run an engine the same day right away, and toss it later.
Heat cycle is good for the guy who BUYS his engines because they'll last longer! It's proven, just do a search on any major bulletin board.