-8 cold start
A few days ago it got down to - 8 degrees here in the mountains of NM when I went to start my Ford F-350 6.7 diesel I hit the glow plugs just until the light went out , about 5 seconds and the truck s...
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Even my 97 7.3 starts right up no matter how cold it is. 2 important thins, keep the batteries topped up (I have a battery tendr on mine when it's sittin), because cranking speed and hot glo plugs or in the case of a Cummins, a hot pre-heater grid is paramount plus a winter grade oil. I run 5-40 T6 year around now.
