Yes, my bad. HE = Heat Exchanger. Burning WVO, IMO, requires pre-heating the grease. This permits at least one full quart to be elevated to 175F-ish at any given time. There is some lost heat from the coolant. That sized HE can handle up to 300K BTUs, so it is "over-sized" for the job since a gallon of #2 or WVO does not even have 200K BTUs in it, but this was the only size to meet my performance objectives.

What is your performance objective? Surely not consuming fuel at the rate of a tug boat. 60 plate HE is way overkill, a 20 plate or even 16 will do. Locating it at the battery tray is the worst possible spot in the engine compartment, by the time the WVO makes it diagonally across to the IP, it will have cooled off a little. The HE should be as close to the IP as possible. The battery should be as close to the starter motor as possible- the trunk is furthest from the starter motor, not to mention the voltage drop with a long + 12V wire run and danger of shorts/ fire. Sorry, makes no sense to me.

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85 300D turbo pristine w 157k when purchased 167,870 July 2025
83 300 D turbo 297K runs great. SOLD!
83 240D 4 spd manual- parted out then junked