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Old 05-07-2019, 06:41 AM   #10
FF
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Join Date: Oct 2007
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The most common practice in cold areas is to either leave them run all night or start them up at 4 or 5AM so the bus is warm when the driver arrives.

A toasty bus with a warm engine from an aux heater might save money , if it was ever used, and maintained..
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