Yes it is a frost plug heater.So question. I'm assuming the block heater is in a frost plug, for the water. Does it get that warm that it reaches the oil pan?
I do not have experience if it will work as good with a plastic oil pan. My experience with old farm tractors as a kid they would not easily turn over with the thick oil. When plugging them in a few hours and they spun right over with 6v systems.
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