Has anyone actually run their diesel car on cooking oil, and does it work??

Yes, I know it's against the law..

Answers:
Its not necessarily against the law - using any fuel on which the duty has not been paid is against the law in the UK, but you can pay the duty on cooking oil to the government, and that makes it legal.

Don't use it in a new or recent car, except in very small amounts (up to 5% mix with normal diesel). Any car with common-rail or Pumpe-Duse injection will have problems with it, as will some earlier-designed engines with direct injection using a rotary pump. Indirect-injection engines will have less problems.

See http://www.vegetableoildiesel.co.uk/foru. for more information.
be brave it does ...i think
I saw a show on spike TV where they ran a disel truck on cooking oil,so yes it is possible,but it has to be filtered ad the truck had more horsepower
I teach motor vehicle as a subject and simply yes it can work as diesel is basically a heavy oil fuel, you do have to add various other thing too though. but having been in the trade for 15yrs plus and removing so many fuel delivery pumps due to been ran on cooking oil. you see cooking oil doesn't have the same lubrication properties as diesel and its additives have, and the delivery pump is a finely manufactured piece of equipment that without proper lubrication it fails rapidly at a cost of anywhere between £500 and upwards of £2000 depending on what you drive. lets face it its just not worth it.
There are people all over the world who do this and are in all the local news. They have to modify the car to get the correct settings, and sometimes add other ingredients to the oil, and if really serious have a refinery system to clean the oil first ( sitting in the garage ), but it works really well. The ones I see on the news have a pick up system with local shops and restaraunts, who are happy to get rid of the waste..
ive seen it on TV, and mythbusters ran a mecedes diesel, on straight used cooking oil, but they did strain it first, look on discovery.com
stupid
I ran my car for about a year on cooking oil I "procured" from a messhall in a RAF camp. All it needs is a little bit of parrafin to mix with the oil. Your exhaust fumes will smell a little odd tho.
Have a friend who has a milk round, he runs his van off veg oil which is perfectly legal, van runs like a dream, but stinks to high heaven !
Daphne, Alabama, U.S.A. The city has set up a central location to gather used cooking oil and convert it to useable fuel for the citie's maintenance vehicles. Cost is appx $1.00 per gallon to refine. Details may be on the city web site -- very interesting news story on this only last week.
PS - they make decorative soaps from the byproducts.
It's ok, but people keep asking me for a chip.
yep,has to be filtered and a bit of methanol added,it doesnt have as much power as regular diesel and smells like Macdonalds coming down the street.
There is a science project a UBC and most of there vehicles run on cooking oil. UBC is University of British Columbia.
i run my petrol on it. it works. just disconect the coil lead that goes to the distributor
i have not personaly but i know you can do.
you have to tune the pump (retard it ) but not sure how far
but why would you want to it does not improve the mpg nor the speed of the car in fact it slows it down.
the engine can run hotter as well

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