Some additives I know of Ethyl methyl lead (octane booster and upper cylinder lube) Methyl Benzene (octane booster)
There is no fuel additive that will increase mileage. This is a myth. None of the snake oil additives work.
no
Two independent studies rated Opti-Lube XPD as the best diesel fuel additive.
By adding a fuel additive in the gas tank you are going to get better gas mileage. It cleans all the injectors and all the fuel lines and the rest of the system.
No
Yes
Short answer. Yup.
Fuel injector cleaner does not hurt anything,but most fuels already have a cleaning additive in their fuel.
Mix it with the fuel, usually just put it in the fuel tank just before filling up with fuel
The fuel additive container should say "O2 sensor safe".
The Power Plus MPG fuel additive is actually an engine cleaner. A cleaner engine will burn less fuel, but it is not known whether a 40% increase in miles per gallon is really possible.
Yes