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Not only better fuel and heaters in the fuel system but most modern systems recirculate the fuel thro' the pump and engine compartment and pick up some heat that way unlike the old in-line pumps(minimec) etc which did not re-circ and were constantly taking in cold fuel.The waxing usually blocks the very fine filters used on diesels.
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Mmm, I remember helping to light small fires under the diesel tank of my father's AECs in the winters of the 1970's, to get some heat into the waxing fuel. I suspect there might be health and safety concerns about doing that now!
At the time, this was one of the big advantages of the Cummins PT system, because it fed the fuel back to the tank, the fuel in the tank was heated by the engine as the truck drove along, so these engines were very resistant to fuel waxing.
Number_Cruncher
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Thanks, no petrol needed then!
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No, because after the *disaster* of having most of the diesel vehicles in the country wax their filters during a cold snap about 20 years ago,
new British Standards for Derv were brought in.
They are no filter plugging ( for fuel supplied)to minus -7c in Summer and -15c in winter.
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If you go up towards the Arctic you will still see this done;also left idling overnight-if they're in a town they plug in a block heater and a fan heater to keep the engine(and pump/filter)warm.
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At the time, this was one of the big advantages of the Cummins PT system, because it fed the fuel back to the tank, the fuel in the tank was heated by the engine as the truck drove along, so these engines were very resistant to fuel waxing.
Reminds me of when I was a kid in the late '70's/ early '80's, my Dads mate was a lorry driver. In winter for his company the drivers used to take turns to go down the depot in the middle of the night to start the lorries up and let them run for a bit "to warm the tanks". One day he asked me if I wanted to go with him that night, at 2am, sub zero temperatures, ten mile round trip, but I declined his kind offer...
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