Quote:
Originally Posted by sandcruiser
I'd guess that $300 of fuel is an awful lot of 30 second idle shutdowns
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Not as many as you would think, however I am talking about the saved time, as well as the saved fuel. If you add up all the 30-90 second wait periods you would have to endure over the course of owning the car, hours of time would be spent waiting. One has to calculate worth per hour.
Quote:
Originally Posted by sandcruiser
it isn't just oil that's involved here. Running the motor allows the head itself to get cooled, and the exhaust manifold.
To some extent I suspect that you've got to balance out the fuel wastage with the the long-term engine care.
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Unless you're running this car on the track, engine temps are not going to get that high to cause the head or manifold to warp, if they do then there are more serious problems than the turbo coking up.
Besides, through thermal convection, there still still be some flow preventing hot spots. If you're worried about the cooling of the other engine components that much, just get an inline pump that turns on when the turbo timer kicks on. Then you have the best of all worlds, no fuel spent idling, turbo cools off for no coking, and the engine has coolant circulating to prevent heat damage.
