Use exactly the octane fuel that is listed in your owners manual. The use of Premium Fuel in an engine designed to run on Regular is a waste of money and will provide no benefits whatsoever. Not more power and no better mileage. However the use of Regular in an engine designed for Premium will cause Pre-detonation or what is commonly called Pinging. Pinging may cause engine damage so burn Premium fuel if your engine is designed to use it. Some people will swear that burning Premium fuel will increase your mileage and provide more power. This is a myth, that just will not go away and is simply not true. Octane prevents pre-detonation and nothing more. The design of the engine is what produces power not the fuel you use.
O.O Premium Gas = $3.60+ / gallon
Super or 93 Octane
Yes. You can always use a higher octane gas but you might see no benefit to the additional cost.
Oxygen is the required gas that is necessary for combustion
No, regular is fine to use.No, regular is fine to use.
chlorine gas
There is no risk in mixing super unleaded gas and regular unleaded gas. Super is just given to the name of a gasoline because of cleaning agents and octane added to the gas not because the gas is completely different.
Yes. You may want to add a lead substitute but it is not really necessary.
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.
No, nothing will burn in carbon dioxide. The gas necessary is oxygen.
What does your owner's manual say? If it says premium, then the answer is YES.
The potential to use the neon gas, the plasma that it creates, or the more 'electrical' section of the neon