Can't break 40MPG...

[supmet]

Originally Posted by BailOut

Please consider turning off your engine if you will be stopped for more than 7 seconds. That is the break even time for the wear and tear and fuel usage of a warm start.

7 seconds is the break even point for gas consumption. What is the break even for wear on the starter and other components, or a "total cost" break even point. I've had toyota starters go bad before 100k miles with 5-6 starts a day max. Also, until you reach peak operating temperatures, turning your engine off and letting it cool down, and forcing it to reheat will increase engine wear, and reduce mileage.

I'd say its closer to 12-13 seconds to break even, and then you should only do it if you KNOW your gonna be 20 seconds or more(when you just roll up to a light changing) A few 2-3 second stops that you thought were gonna be longer will negate everything your doing, and all you're left with is a burnt out starter.