EOC - Be careful if you have a turbo - shutting off the engine will leave the oil sitting in the turbo happily boiling away and overheating the seals. I have a thread about this somewhere.
See Wikipedia on
Turbo Timers.
Quote:
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After a period of driving when a turbocharger has been working hard, it is important to let the engine run at idle speed for a period of time, allowing the compressor assembly to cool from the lower gas temperatures in both the exhaust and intake tracts. At the same time the lubricating oil from the engine is able to circulate properly so the turbine won't burn the lubricating oil that would otherwise be trapped within the charger with the turbine rotating at high speed.
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