I see your point of view, and Montys also, what i find a little curious is that none of you says it prolongs engine life that evryone else is pointing out. You two are amongst the moast experienced engine guys on this forum.
Monty pointed out to me that it would be beneficial for the crankpin and rod, but thats abaout it.
One question, do you belive that it is harder on the rod/pin to run out of fuel at WOT on the straight, than not preheating your engine before you start it cold? I strongly belive that pin/rod gets alot more abuse when running out of fuel at WOT.
The FACTS are:
.Preheating WILL prolong the engines life
.Preheating will give you better runtime because engines use more fuel when they are warming themselves up after a cold start
.Preheating will help you achieve an optimum tune FASTER
.Engine heaters are NOT a marketing gimmick BECAUSE it DOES have beneficial use for its users and does exactly what its supposed to