Does Mixing Gasoline Grades Affect the Car?

[DelBryce]

Mixing gasoline grades does affect the car. The gasoline grade should strictly follow the manufacturer's recommendations for the vehicle; otherwise, it can easily cause damage. If the vehicle explicitly requires 95-octane gasoline, it is best to adhere to this requirement. Randomly mixing gasoline grades may lead to insufficient anti-knock performance. While issues may not be noticeable in the short term, prolonged use can affect the engine, cause carbon buildup, and impact the vehicle's ignition system and spark plug lifespan. When using the vehicle, avoid arbitrarily changing the gasoline grade. Follow the instructions in the manual or the label on the fuel tank to add the appropriate gasoline grade. Higher-octane gasoline may be better for the vehicle, but it could also increase the owner's financial burden. Therefore, the best approach is to use the gasoline grade specified on the fuel tank or in the manual and avoid mixing gasoline grades.