Jet-fuel
aeroplaen
If you are using bio fuel you are not using fossil fuel. Crude oil is a fossil fuel
air fuel
The only byproduct of using pure hydrogen as a fuel is water, often in vapor form.
I think that it uses hydrazine fuel.
Acid rain and global warming are the man two risks using oil as fuel.
If you are using E85 fuel yes it will get less mileage. If you are using regular unleaded there will be no difference.
The advantages of using 4-stroke fuel in engines include better fuel efficiency, lower emissions, and smoother operation compared to other types of fuel.
kkisok
Electric motors use batteries not fuel. It is not electric if it uses gasoline or any other type of fuel. A gas motor can not be easily converted to using other types of fuel.
Our sun, Sol, uses hydrogen for fuel.
using overdrive will use less fuel as it is another gear to lower your rev's Overdrive is a crusing gear to get better fuel efficiency at the price or torque