Cars that call for premium gas tend to either havehigh compression engines or forced induction (supercharging or turbocharging). That means that the fuel and air is under very high pressure in the combustion chamber. That鈥檚 one way to make a high-powered engine. High compression and forced induction introduce their own complications.
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What happens if you put premium gas in your car?
Persistent knocking can lead to engine damage. The premium gas has a higher octane level than regular gas. This higher octane level prevents pre-ignition or pinging/knocking of the engine under power. Some engines have knock sensors that detect pinging/knocking so the computer adjusts the engine to prevent that from occurring.
Which cars require premium gas?
Luxury cars like some BMWs and Jaguars, or highly tuned engines like in the Camaro ZL1 or Corvette Z06 are more likely to require premium gas. Again, Edmunds compiled a list of recent cars that require premium gas for you. These engines have the highest risk of knocking.
What happens if you put regular gas in a 91 car?
If the octane rating is less than 91, you could damage the engine and may void your vehicle warranty. Note that this applies only to engines that require premium gas. Some manufacturers recommend premium gas but say that regular or mid-grade gas can be used instead.
Can you use premium gas instead of regular?
Some manufacturers recommend premium gas but say that regular or mid-grade gas can be used instead. They usually warn that using lower-octane gas could reduce performance and fuel economy. When that happens noticeably, or if engine knock occurs, they advise to start using premium. Premium gas is similar to regular unleaded fuel.