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Could be low octane, Buy an octane booster and pour it into your gas tank (only costs a few dollars) or try a higher octane gasoline.
Probably, yes. Gasoline comes with different octane ratings because some engines require a higher octane to prevent pre-ignition ("pinging" under acceleration or on hills). Check your owner's manual. Also, you can experiment with lower-octane (and therefore less expensive) gasoline. If you do not experience pinging with 87 octane gas, then that is all you need.(Technically, a higher-octane gas burns slower than lesser-octane gas, but that is beyond the scope of this question.)
sulphur dioxide is formed from sulphur compounds when petrol is burned
For one tank of gas, probably not. However, over the long term the engine may wear more quickly. High compression engines are designed for high octane gas.
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To produce a higher octane fuel. A fuel that will power high efficiency engines.
Gas turbines use jet fuel and reciprocating engines use high-octane gasoline.
Carbon monoxide and carbon dioxide mostly
A 3vze engine will take anywhere from regular 87 octane, up to 100 octane race gas. However what is your purpose to using higher or lower octane, Using regular, plus, or premium will work well. however higher mile engines would prefer 91 octane!
91 octane petrol will ignite at a lower temperature and burn faster, which can cause knocking in an auto engine. Lead compounds were added at one time to raise the octane rating, but recently engines have been redesigned to work on low (<98) octane petrol (or gas in the US colonies)
There is no octane in gasoline... it is the equivalent of octane.