Skip the auto shop - Our mechanics make house calls

Q: What type of gas so I use?

asked by on

Does this truck have a gas chip in it that requires it to have 91 fuel in it? OE will it run on 87 fuel?

My car has 243088 miles.
My car has an automatic transmission.

A: Your truck should be perfectly fine running...

Your truck should be perfectly fine running on 87 octane fuel. Generally, engines that use a higher compression ratio and/or use supercharging or turbocharging to force more air into the engine will require higher octane fuels. Increasing pressure in the cylinder allows an engine to extract more mechanical energy from a given air/fuel mixture but requires higher octane fuel to keep the mixture from pre-detonating. In these engines, high octane fuel will improve performance and fuel economy. In any case, you should always reference your owner’s manual to be certain as to the proper octane fuel to run in your vehicle. If your owner’s manual says your vehicle doesn’t require premium but says that your vehicle will run better on higher octane fuel, it’s really up to you. The cost increase is typically higher than the fuel savings. However, lowering CO2 emissions and decreasing petroleum usage by even a small amount may be more important than cost to some consumers.

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!

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: Truck does not start

It sounds like you may have a faulty fuel pump that may have been damaged as a result of running it out of fuel. As you may know, today's fuel pumps require the fuel to keep them cool and lubricated....

Q: Engine Stalling

If you got a bad batch of fuel this may have caused the engine to run bad and stall as the fuel may have clogged the fuel injectors. If the fuel injectors got clogged then they may need to be...

Q: 2016 f150 supercab. Low rpm vibration.

The low rpm vibration may be caused by an engine mount failure or poor fueling from a weak fuel pump. Being a 2016, your concern may still be under warranty so you should take the vehicle to your local dealer...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...