Q: Using E-15 fuel in my car do I need to use regular unleaded fuel maybe once in awhile or is it safe to continue to use the E-15?

asked by on

Can I use E-15 fuel on every fill up or should I use regular once in awhile

My car has 93000 miles.
My car has an automatic transmission.

E-15 is shorthand for gasoline blended with 15% Ethanol which is a fairly corrosive material which can cause damage to rubber parts and other critical parts over time. Ethanol also attracts and bonds with water from the air, and that water can separate out inside the tank due to phase separation. If your vehicle sits for long periods between use, the moisture settles to the bottom of the tank and can potentially clog in-tank pumps and filters. Damage is also possible in fuel lines, injectors, seals, gaskets, and valve seats as well as carburetors on older engines.

The main issue with respect to E-15 in many cases is whether or not the car will be covered under warranty from damage caused by using this product. GM and Ford have certified their own cars starting with 2012 (GM) and 2013 (Ford) to be compatible with E-15 and so some of the newer cars may not have any trouble with this.

I would not recommend using this fuel on longer drives where the chances of burning through an entire tank relatively quickly are greater. This may lessen the chance of excess E-15 fuel sitting in the bottom of your tank for longer periods of time where it may be prone to causing damage as outlined above.

If you run into any issues, feel free to contact YourMechanic, as one of our mobile technicians can come to your home or office to service your vehicle.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. Using E-15 fuel in my car do I need to use regular unleaded fuel maybe once in awhile or is it safe to continue to use the E-15?

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: Is it normal for a car to jerk a bit back when you make a stop

It sounds like your vehicle may be a bit low on transmission fluid or you may potentially have a bad transmission control solenoid. As you know, the transmission works on hydraulic pressure built up from the fluid inside and uses...

Q: How do I calculate the fuel economy?

Calculating fuel economy will help you keep track of how much gas your truck uses. Knowing this is helpful to most drivers. To calculate the fuel economy. Fill the fuel tank completely and record the odometer reading. If you...

Q: High RPM's when slowing down or coming to a stop

This is a common issue with a failing throttle position sensor in that it tends to reset itself when shutting the vehicle off, which is why you may notice it goes away when shutting the car down and restarting it....

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...
How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
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...