Quote:
Originally Posted by Diesel_Dave
I'm a little confused about what you said about your block heater being good enough for everything. If it's a coolant heater it heats the coolant. If it's an oil heater it heats the oil, etc. A coolant heater won't heat the oil no matter how big it is. Granted, if your coolant heater heats up the coolant and block, your oil will heat up faster once you start the engine, but it hasn't heated the oil or tranny at all (directly).
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When I said everything, I meant in the engine. Like you said the coolant heater transfers heat through out the engine. It heats the oil (to a point) by conduction-just by having everything else around it warmer.
My initial oil pressure with the block heater on in cold weather is lower than it is with out it on. That has been the case for all of my vehicles with block heaters (93 dodge, 99 f 250, 05 Tacoma). On my tractors you could actually feel the difference by comparing the pan to other parts of the tractor.