Do You Need to Worry About Old Gas in Your Car’s Tank? | Family Handyman

“If you have a car that hasn’t been driven for a while, you might be wondering if the gas in the tank is still OK or if it needs to be removed and fresh gas added. Here’s your answer.

Is old gas in the tank bad for your car? The quick answer

In almost every case, old gas is not an issue. Gas that sits does slowly go bad. However, gas that sits, even for a few months can be redeemed by topping off the tank with fresh gas. When the fresh gas mixes with the older gas, the motor will operate properly. John Ibbotson, chief mechanic at Consumer Reports, says that, “The new gas will mix with what’s already in your tank, and any variance in the octane will be adjusted for automatically by your car’s engine computer.” The adjustment will get the engine running back to normal.”

Source: Do You Need to Worry About Old Gas in Your Car’s Tank? | Family Handyman