The only ones I know of have a diesel engine, there are none in production and there is no STC yet, but there are some experimentals that have them.
Most small engine aircraft such as Cessna's use a low leaded gas, usually blue in colour. But a lot of Cessna's can be converted to use regular gas that you would use in a car.
They run on 100LL avgas. It has a different price at every airport. Go to http://www.airnav.com, click on "Airports" then enter the name of the airport you want to use to learn the cost of fuel there.
Aviation fuel. In the past, they could run on 80LL or 100LL. 80LL is no longer available. Unleaded avgas types, such as 93UL, 94UL, 100LL, 102LL, etc. are still undergoing certification.
Avgas 100LL
If you use a f/a-18 about 10 seconds if you use a cessna 172 about 10 months
The Cessna 182 will use 11-12.5 gallons per hour.
Sym Jet Euro 101cc Fuel
Jet fuel is high grade diesel so a jet fuel car would use high grade diesel fuel.
Avgas, or if it has a jet engine, it would use either Jet-A1 or Jet-B fuel.
Yes, it is safe to use a fan for this. Jet fuel is not easy to ignite.
The type of fuel is specific to the type of engine, not the aircraft. Helicopters that have jet engines use jet fuel, and helicopters that have internal combustion engines use gasoline. However the General Electric T-58 had a device in the fuel control that allowed you to burn just about anything from avgas to jet fuel to kerosene.
jet fuel