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The basic ingredients of gasoline are obtained by separation of crude oil or cracking (turning larger carbon chains into smaller ones that can be used). The premium refers to how good and 'pure' the fuel is; it has been cleaned of any damaging particles or unusable carbon fractions. The unleaded refers to the fact that lead has not been added. This was a common practise to help increase the efficiency until it was banned because it caused toxic lead pollution.

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Q: How is premium unleaded gasoline obtained?
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Does unleaded engine can use premium gasoline?

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.


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The advantages of using premium unleaded gasoline compared to regular unleaded gasoline is its increased efficiency and higher burn rate. It is designed to work in higher combustion engines and will often produce poor performance in vehicles designed for regular gas.


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