Yes you can use premium gasoline in unleaded because premium gasoline is also unleaded. The only reason it is called premium gasoline is because it has a higher octance then regular unleaded. Regular unleaded has an octane rating of 87 and premium has an octane rating of 92. Premium gasoline burns slower then regualr gas because it has a higher octane rating.
Not as long as the premium fuel is also unleaded.
always premium gas
The best gas mileage from unleaded gasoline or premium gasoline depends on the car. Old cars get better mileage from unleaded.
Unleaded Premium
You can use either regular unleaded or premium unleaded.
They're usually Regular Unleaded, Mid-Grade Unleaded and Premium Unleaded.
Premium gasoline is unleaded. Yes, you can use it, although there may be no actual benefit in it.
does esso premium fuel have ethanol
Premium.
They are both 'unleaded' only the 'octane' rating is different. So to answer your question Yes.
The 2009 Audi TT runs on premium unleaded (required).