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Old 03-31-2018, 08:33 AM   #7 (permalink)
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Join Date: Mar 2018
Location: Czech Republic (in the middle of Europe)
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fabia - '03 koda Fabia I
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I think I was a bit misunderstood.
This has nothing to do with engine damage (I keep it in recommended RPMs all the time), nor with idling (I never idle to warm up the engine).
The thing I am trying to optimize is the time when I (would) turn the alternator on to recharge the battery after starting the engine. One situation could be recharging the battery when the engine is still cold to help it heat up faster. The other is recharging the battery after getting the engine heated up by driving.

I know the savings could be negligible, but having the answer to this question gives me answer to other more important questions about hypermiling (e.g. route selection).
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