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Many people use premium gasoline thinking that it's better for engines than regular. That can be a costly misconception.
Regular gas typically has an octane rating of 87, while premium is rated at 91 to 93.
But octane grades don't represent "good, better, best"; they simply measure a fuel's resistance to pre-ignition (pinging or knocking), a condition in which gasoline burns uncontrollably in the engine's combustion chambers, possibly leading to engine damage. The higher the octane rating, the more resistance it provides.
Most engines are designed to run fine on regular gas. Using premium in them doesn't improve performance; it only costs more money.
Even many cars for which premium is recommended can use regular gas without a problem. That's because most ...