- First Name
- Matt
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- Jun 20, 2025
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- Clearwater
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- Audi Q7
The reason to let the engine idle for a few minutes before switching off isn't to allow the overall engine oil temperature to reduce; it is specifically to allow the turbo to cool down so that the oil left in and around the turbo isn't going to "boil" or coke up. To exaggerate the situation, let's say you had been racing stop light to stop light (trying to get to work on time) for the last 30 minutes, and the turbo has been working extra hard, and the temperature of the turbo has elevated. Turbo timers are not as common as they used to be since engine manufacturers have improved the cooling capacity and design of turbos.
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