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Block Heater

61K views 42 replies 23 participants last post by  greentraverse  
>>>>>is that a reason why many semis when parked in cold areas- leave the engine running instead of shutting down?

That's one reason plus keeping the heat going for the sleeper cab if it is being used. With diesels, fuel consumption at idle is extremely low to the point they don't worry about any reduced mileage.