In cold weather, a block heater will provide a rapid start ( of course it does). Inaddition, it will reduce engine wear and provide earlier heater use for occupants. Without a block heater in my 1983 300CD, I could start it with most of the already mentioned procedures (preheat, synthetics, etc.) in temp down to zeroF. Good thoughts guys

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Roger
1983 300CD 246k sold
1998 C230 52k
1980 450SL 75k needs AC
1999 Subaru Outback Ltd 43k