Big boom-boom.
Not as long as the premium fuel is also unleaded.
The best gas mileage from unleaded gasoline or premium gasoline depends on the car. Old cars get better mileage from unleaded.
Bad performance ,pinging ,engine detonation,over heating, just too name a few.
Depends... What does you owner's manual say? I currently drive an E-Class 320, and it requires Super Premium (91-92 Octane level). If I even try to use Premium instead of Super Premium, or even worse.... regular.... the sensors in my car know within a few seconds of turning on the car.
Nothing happens, except your wallet will be lighter.
Yes In a modern car changing from regular to premium is no problem It may have been costing you power and fuel mileage to run regular, but if your car does not need premium it is a waste of money. On older cars running regular may damage the engine, but we are talking cars built in the 1980s or older.
Yes. You can always use a higher octane gas but you might see no benefit to the additional cost.
That car has a knock sensor, so you won't destroy it. It will, however, run terrible because the timing's so retarded by the knock sensor.
Bad idea. Most cars that are Premium Only are designed to take about 92 octane fuel at the lowest. The car will, in fact, run with super unleaded gas but it will create damage to your engine in the long-run. And if low octane gas is used frequently, it can greatly reduce the life of your car.
unleaded...besides that don't waste your money on premium gas, the car's not worth it.
Yes. You may not get the same performance (horsepower) as you would with premium gas, but modern cars can run fine on any grade of unleaded gas.
Yes, but your engine will cut back on power. The computer is designed to monitor the octane level and perform accordingly.