Reed Valves.
An engine needs lubrication to reduce friction and prevent overheating of the internal parts. Oil is added to the gasoline in a 2-cycle engine because this type of engine does not have an oil reservoir.
Gasoline.
Premium Leaded Gasoline. If you run unleaded gas the valves will eventually wear out because the lead was a lubricant. The valves would need to be retrofitted to sodium filled or some other type that can survive without the lead.
The type of oil you use depends on the type of engine you have. A good way to tell if it is a two-cycle or 4-cycle is to look for an oil filler cap - usually a screw-in cap about 1 to 1-1/2 inches in diameter. If the engine has an oil filler cap, it is a 4-cycle engine and you add 30-weight oil through the filler hole. If there is no oil cap, then the engine is a 2-cycle and you must mix 2-cycle oil with the gasoline. If it is a 2 cycle be sure and use only 2 cycle oil in the mix.
Your question contained no year or model, so the answer will be pretty general. The fuel is going to be regular gasoline. The pre-mix is determined by a number of factors. Is the engine a 2-stroke or a 4-stroke? 4-strokes require no pre-mix. Use only regular motor oil in the crankcase. 2-strokes require 2-cycle oil to be added to the gasoline before it reaches the cylinder(s). Some 2-cycle engines require you to mix the gasoline and 2-cycle oil in a gas can before you pour it into the gas tank. Some have separate tanks; one for gasoline, one for 2-cycle oil. This last type allows the refueler to pour straight gas in any amount into the gas tank and any amount of 2-cycle oil in the oil reservoir -- the engine will mix them together automatically in the proper amount. Check your user manual to see what type of engine you have. If you run a 2-cycle engine without 2-cycle oil, it will destroy the engine.
If the engine is a diesel use diesel fuel. If the engine is a gasoline engine use unleaded gasoline.
A hybrid petrol/gasoline and electric engine.
a boat with a gasoline inboard enginea boat with a gasoline inboard engine
2 cycle
I've always used " regular " unleaded gasoline , 87 octane , in my 5 horsepower Tecumseh engine on my snowblower and my 4 horsepower Tecumseh engine on my lawn mower
Internal-combustion
FORDS 6.8 liter V10 is a ( GASOLINE engine ) * if that is what you are asking