Freezing diesel fuel

Jan 27, 2004 6 Replies

Even in quite cold weather my old [H Reg] Astra 1.7 D diesel starts reasonably well, however recent weather scares have predicted that temperatures could plunge to as low as -10 degrees and I have read that diesel fuel can actually freeze, can someone tell me at what sort of temperatures this is likely to happen and can anything be done about it?... TIA


In Russia the truck drivers light fires under their fuel tanks when they park up overnight. Of course it's a somewhat fine art to make the fire big enough to keep the fuel liquid but not so big the truck ends up on top of your house, or on top of someone else's house a hundred yards away. I suggest practising on someone else's car first.

Dave Baker - Puma Race Engines

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I'm not at all sure why women like men. We're argumentative, childish, unsociable and extremely unappealing naked. I'm quite grateful they do though.

In winter , diesel fuel does have additives to prevent 'waxing', or partial freezing. If it does freeze, use the old lorry driver's solution - light a fire under the engine :-) Better still, buy a car with a petrol engine.

Terry D.

Or just shove some petrol in the tank, about 500ml should do it :)

well, if you are running on red diesel, then you may worry, but road diesel nowadays is formulated to handle our winters,

The old trick was to add a litre or 2 of petrol to the tank if you felt the engine loosing power as the diesel waxed, but you hardly ever need to do that nowadays,

Most modern engines have a heated fuel filter at the least, once the engine is running the fuel is pumped from the tank, through the injection pump where it's heated, and back to the tank, it'll transfer the contents of the tank about 10 times an hour through the pump.. the injectors take what they want, the rest goes back to the tank.. nice and warm.

BTW, when listening to weather forcasts ignore the wind chill factor they give out so we know when to watch out for brass monkeys, the wind chill thing applies to humans and not engines, i'll let someone else give the physics lesson for this :)

As a ex petrol station propriter I can assure you that diesel in the UK changes from summer to winter grades without the public ever being aware of it. It is a legal requirement to have the correct grade of fuel in the tanks by a certain date. unsure of the exact date but think its in October to change to winter grade.

The winter diesel has anti-icing agents in it to prevent the frezzing of the fuel this normally occurs in the filter. Some engines will incorperate a heated filter for cars used in colder climates than UK.

If for any reason winter diesel is not availble some manufacters will recomened the adding of petrol or paraffin up to 25% to the diesel fuel. Hence if you put petrol by mistake in your diesel car it is not as bade as diesel in a petrol engine.

The bottom line is in the UK there is now problem with icing.

regards

Keith

5 litres would be better. I remember in the 50s/60s when winter diesel was not available, the dumpers etc on building sites used to suffer from waxing of the fuel, and they always used to bung a gallon of petrol in. I know from personal experience that a diesel will survive a 25% petrol addition and survive, although they start to run like a 3 legged dog at that point. Filling with diesel cures it with no permanent ill effects that I could detect, and the engine passed its emissions test for years after.

So thank f*ck for that.

Got away with it :-))

Steve

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