| RE: Premium vs Regular Gas
I have a friend who works for a refining company. There is no difference between any of the gas. Whether is Exxon, Shell, etc. They pull from the same tank. It just depends on the octane - each tank has a different octane level. What makes each gas company (Exxon/Shell, Chevro etc) different is the additive they add.
He said just watch out for the small guys shops, their tanks may be dirty and could contain some water and dirt. Also, never pump gas at a station if you see a truck filling up the storage tanks. When they fill-up the under-ground storage tanks it kicks up all the sediments.
About octane levels - newer cars are more sophiticated. if you put a lower octane fuel - it adjusts the engine accordingly - so you won't harm your engine in anyway.
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