The vehicle is a 1994 Ford E350 Club Wagon XL, 7.3L diesel. It is equipped with a block heater, however this winter is the first time that its use will be mandatory, since I am wintering in Thunder Bay, Ontario.
The block heater heats only the coolant, correct? I need to know if the block heater alone will be sufficient, or if this should be supplemented with an oil pan heater. Someone recommended the latter, but I know nothing about this.