Skip the auto shop - Our mechanics make house calls

Q: Do I really need to use high octane fuel or can I use mid grade (occasionally)?

asked by on

is it necessary to use the higher octane gas. i sometimes use mid grade and I don't hear a knock or ping. with the price of gas saving a few dollars at fill-up seems like it worth it

My car has 6600 miles.
My car has an automatic transmission.

If your vehicle is required to use high octane fuel, then using anything else can cause damage to the pistons and valves in the engine. When you say you cannot hear any pinging when you are using mid grade fuels then you need to be sure since not all pinging can be heard by the human ear. The pinging may be happening so light that you would not be able to hear it. Any pinging is not good to the engine and can burn holes in the tops of your piston. Pinging is the fuel is igniting before the engine wants it to and ignites before the ignition sparks it. This is why it is called pre-ignition. I recommend not using any mid or low octane fuels for this vehicle.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!
  • Home
  • Questions
  • Do I really need to use high octane fuel or can I use mid grade (occasionally)?

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Knocking front drivers side, slight lean.

Hi there. Check the suspension and see if it's loose or has a broken bushing. A control arm will move back and forth when the vehicle is accelerated if the parts are loose or missing any bushings. If you need...

Q: What could make a car stop running in the middle of driving it?

Hi there. From the description you provided, your vehicle stalling once, could of been caused by variety of reasons. A temporary glitch in any of the vehicle's systems that keep it running. Unfortunately, something like this would be very difficult...

Q: how do I delete a phone from Handsfree in my 2015 Odyssey EX-L?

Hi there. Although this video is for a different model Honda, the steps should be similar for deleting a device from Bluetooth. If this doesn't work, contact your local Honda dealership service department and they should be able to assist...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...