Re: Warming up Diesels with minimum fuel usage in mind
At 50F+, I just turn the key and when the glow light goes out I crank. Then back out and drive to where I am going and do what needs to be done.
Under 50F, I do the same -> but may temper it if there are sounds of complaint from the cold fluid.
Under 10F, I let it idle until the warmed up some, then drive and do. As it gets colder the idle time is longer. Also the minimum operation time is longer too. You HAVE to run a diesel for a hard hour to burn out the water and fuel that may have gotten into the oil. For that reason, I minimize winter operations.
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