Here's some more knowledge. There are different types of extinguishers A,B,C,D,K,Halon, Wet.
Class A Fire= ancipiant, woods, papers
Class B Fire= Flammable Liquids
Class C Fire= Electrical Fires
Class D Fire= Flammable Metal
Class K Fire ext.= For grease fires, you'll see these in Hood systems in Kitchens
Halon=Stay Away From Them YOU CAN DIE FROM ASORBTION OF HALON! They're mainly used in big computer rooms for servers and in plants but are being phased out due to the dangers of it's use.
Wet extinguishers= "Pump Cans" or water extinguishers really self explanitory.
I'd mount a 5lb. ABC ext. if needed. But remember even though it has a "C" on it for electrical fire it will still carry a charge. It uses a "broken" pattern of dry powder type ABC Chemical (which is also HIGHLY corrosive too!) but the problem is that is discharges so fast it will give you a little jolt. It won't hurt to bad, just enough to let you know it's there and you stop. But you can kick it back up again.
Stay at least 5 ft away and sweep DO NOT GOUGE ANY FUEL and be mindfull of people around you.
Also I'm with the other guy on here. LET THAT SUCKER BURN! Call the FD and your insurance company, that's why you've got it! But for now if you want to have one the best to buy is called a "Purple K". It's best on vehicle fires.http://www.smokesign.com/purkfirex.html
That's the one's the military carries in all of they're vehicles, even tanks and choppers.
Oh yeah forgot about Co2 Extinguishers, but don't worry about those in a vehicle. WAAAAaaayy TO HEAVY!