IAM tells diesel drivers how to avoid fuel freezing

Diesel drivers: watch out for waxing, says IAM

With -20°C forecast in some parts of the UK, the IAM (Institute of Advanced
Motorists) is warning drivers of diesel cars to remember that their fuel can wax
over in extremely low temperatures, which could damage the fuel filter and cause a
breakdown.
 
Neil Greig, IAM Head of Policy and Research, said: "Waxing is the formation of
crystals in the diesel which block the filter. If you drive a diesel vehicle, it
pays to try and park in a garage or sheltered area, and try to not to leave your
vehicle standing unused for too long,"
 
"If you can’t park in a garage, do ensure that the engine bay of the car is parked
downwind, so that the wind hits the back of the vehicle first. After starting the
engine, let it idle for 10 minutes before driving off, as this will let the heat
from the engine warm the filter and pipes."
 
Lorries with exposed fuel tanks and fuel pipes are most at risk but cars and vans

can also be affected if it’s cold enough.

 
Water in diesel fuel tanks and filters can also freeze. Mr Greig advised: "Keep the
fuel tank full and, if possible, fill it before arriving at home as this will
prevent the build up of condensation on the inside walls of the tank, helping
prevent water building up in the bottom of the tank."

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