More observation reveals the 2.8ltr diesel doesn't really become economical until coolant temp. of 70*C is reached. The temp./consumption ratio is very non-linear, i.e. not until abt. 70*C is reached does one get the best figures. There is a "lag" as the rest of vehicle warms, e.g. gearbox, differential, bearings, tyres etc.

At over 75*C when coasting/hypermiling at 35mph., (engine idling of course) a computed readout of over 50mpg. was shown.

With ambient of 7*C and warming the engine from cold with the electric fan-heater under at 2Kw. for just over an hour made the engine (and oil) to 35*C. This didn't improve the fuel consumption much at first, but shortened the warm up time considerably. All the engine airflow restrictors in place. (Mod).

The cost-savings, electric (calc. at 16p per unit) vs. diesel were on the side of electric, plus the incalculable saving on engine wear due to starting with hot oil. Although using an electric fan-heater as a block heater is not as efficient as a proper 'plumbed in' block heater, base/installation cost is negligible, for me, nil. Unf. proper block heaters do not heat the engine oil, only the coolant. But you could have a separate electric oil heater fixed to the sump in that case.

Leedsman.

 

Thanks for taking the time out mate to share your results My mate who lives in Canada (-36 Burrrrr) has the 2 heaters on his vehicles. They just won't start unless you do. His are Petrol powered, as oil burners fuel wax up far to fast...

 

Goggsie has a 240v Kenlowe heater, there are 12v versions and even mains volt water versions at £100 quid brand new.

 

Seen that one in the pix on E-bay, they come from Germany.

Leedsman.

 

This is what I got in box many moons ago. Ally looking thingy with 2 pipe connections and plug socket is the preheater of course. Not tried to see if the coiled up power supply cable in box will go as far as the back bumper from the heater as yet.

 

Just mount the mains in the front, or anywhere close to where you put the heater can, it makes you life easy and looks just as good. One of the two air-scoops will do just make sure you have a wet-proof cover. Alternately mount in the engine-bay and put a 13a rubber connector tail somewhere handy, that way its safe, instant, and no messing with opening bonnet or cabling an entire car length.