Is premium gas worth it?

Concerns & risks

You were trying to treat your car well, so you've been filling it with premium. Then you saw the price difference on your receipt.

Paying extra for no benefit adds up.

Causes & evidence

Use the grade your owner's manual recommends. If it says regular, premium usually isn't needed. See fuel economy basics.

What to do

1. Check the manual or fuel door.
2. Use 'required' premium if listed.
3. 'Recommended' premium may be optional; read the manual.

Common mistakes: Common mistakes: assuming premium cleans the engine or adds power to any car. If the manual says regular, premium usually just costs more. But if the manual says premium required, use it. Use gasoline with the right ethanol content for your vehicle, especially for older cars or small engines. If you hear knocking, talk to a mechanic. Read the fuel door label too. If you're still unsure, ask your dealer service desk what grade your engine is designed for.

Speed Man tip: Knocking or pinging is worth a mechanic visit.

Wrap-up: Follow the manual. Required vs recommended. Don't overpay.