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?

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.

Experienced mechanics share their insights in answering this question :
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.

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The EPA said E15 can be used in any vehicle from 2001 or newer. It cannot be used in motorcycles, vehicles with heavy-duty engines like buses and delivery trucks, off-road vehicles like boats or snow mobiles, and lawn equipment.
What kind of car can we run E15 in? E15 has been certified for use in any gasoline-powered car with a U.S.-certified emissions system from 2001 or newer, whether it`s flex fuel or not. To be clear, 90 percent of all vehicles on the road today fall into this 2001-and-up category, so chances are that`s your vehicle.
The U.S. Environmental Protection Agency (EPA) defines E15 as gasoline blended with 10.5% to 15% ethanol.
E85 gas is suitable for use in any vehicle designated as a flex-fuel vehicle by the manufacturer. Cars.com reports that flex-fuel vehicles are capable of running on both ethanol-gasoline blends and regular gasoline.
The EPA has approved E15 for use in cars built since 2001, but automakers, do not necessarily agree that the older cars should use it. Owners of collector cars, though, should avoid using E15 in any vehicle that hasn`t been modified to handle it.
In fact, your car`s fuel economy can drop by up to 30% when you switch to E85. E85 can damage your car`s engine: Ethanol is a corrosive substance that can wear down your engine`s components over time. Ethanol can also cause problems with your car`s fuel system and ignition system.
E15 Lowers Carbon Emissions

Ethanol helps reduce greenhouse gas emissions by 40-50% compared to petroleum. By displacing hydrocarbon substances like aromatics in gasoline, ethanol significantly reduces emissions of air toxics, particulate matter, carbon monoxide, nitrous oxides, and exhaust hydrocarbons.

E15 is meant to be a cleaner form of gasoline because it includes biofuel — which is considered “carbon neutral” — and it does burn cleaner than 100% gasoline. But using it actually creates more ground-level air pollution.
WILL E15 HURT MY CAR`S ENGINE? E15, often sold at the pump as Unleaded 88, for its octane rating, can safely be used in all cars, trucks and SUVs from 2001 on.
Running E15 gasoline in a car that is not approved for it could cause engine problems. Ethanol is known to corrode rubber and some metals and can cause additional moisture in the fuel tank for cars that sit for a while.
Continually filling a standard gasoline car with this high-ethanol fuel can result in serious fuel system corrosion. Plus, when you accidentally put E85 fuel in a car, it may void your engine warranty. That means you could be on the hook for the repairs, even if your car is brand new.
E85 has higher octane than regular gasoline. This means that E85 is a lot better for your car`s engine than regular gasoline. It is also a cleaner fuel with lesser harmful emissions. On the downside, E85 burns faster and produces lesser energy than gasoline.
Ethanol-blended gas lasts up to 3 months.

Generally, the higher the ethanol content in the gas, the shorter its shelf life, so E15 (15 percent ethanol content), E20 (20 percent ethanol), or E85 (85 percent ethanol) gas will expire sooner than E10 gas will.

Some fuel stations are now selling gasoline with up to 15% ethanol. This E15 product is not recommended or approved for use in small engines.
Ethanol has a corrosive action on fuel-system components, magnesium, aluminium and rubber. Running E85 on older model engines without tuning and replacing some components will ruin the engine in short time. Replacing fuel hoses, fuel pumps, gaskets, seals, fuel filters, fuel injectors, throttle bodies, etc.
The Disadvantages to using E85.

The main disadvantage to using E85 is the fact that it`s less dense than traditional gasoline. This means that your car will need to burn more fuel to get the same amount of distance compared to petrol, this works out to be about a 30% increase in fuel consumption.

E15, often sold at the pump as Unleaded 88, for its octane rating, can safely be used in all cars, trucks and SUVs from 2001 on. Those model years represent more than 90% of vehicles on U.S. roads. The ethanol industry says the fuel is one of the most tested in history and has no effect on vehicle drivability.
E15 is a blend of 15% ethanol and 85% gasoline. It contains 5% more ethanol than E10, which is the most common fuel used in the U.S. E15 is higher in octane – typically 88 octane while E10 has an octane rating of 87. Retailers are offering E15 as Unleaded 88 to highlight its high octane value.
E15, often sold at the pump as Unleaded 88, for its octane rating, can safely be used in all cars, trucks and SUVs from 2001 on. Those model years represent more than 90% of vehicles on U.S. roads. The ethanol industry says the fuel is one of the most tested in history and has no effect on vehicle drivability.
E15 is a blend of 15% ethanol and 85% gasoline. It contains 5% more ethanol than E10, which is the most common fuel used in the U.S. E15 is higher in octane – typically 88 octane while E10 has an octane rating of 87. Retailers are offering E15 as Unleaded 88 to highlight its high octane value.
E15, usually dispensed from pumps with blue labels, should not be confused with E85, which contains up to 85% ethanol. It`s for use only in flex-fuel vehicles, with engines that can withstand that corrosive effects of a high blend of alcohol.

Relevant Questions and Answers :

the most relevant questions and answers related to your specific issue

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?
ANSWER : 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.

I have changed the car battery on my Renault Grand Scenic and used the car that day on the sunday. However 3 days later the car wo
ANSWER : Hello, thank you for writing in. If the new battery has also failed to hold a charge, the alternator is likely not working correctly. You can test the alternator at home with a voltmeter, or you can remove it and have it tested at most automotive parts stores. It will need to be replaced if it has failed. You will also want to make sure all of the electrical connections are clean, dry, and tight. For more help testing or replacing the alternator, contact our service department to schedule an appointment.

I have to fill gas tank everyday due to car using alot of fuel
ANSWER : Hi there. There are dozens of problems that can lead to a drop in gas mileage, some of them are serious and some can be easily corrected. Here are some of the more common issues that can affect the fuel efficiency of most cars.On newer cars like your Sonic however, unless you’re driving more than 300 miles per day, you shouldn’t have to fill the fuel tank daily. Since the dealership has attempted to resolve this issue, you might want to have an independent professional mobile mechanic complete a car is getting worse gas mileage inspection to see if they can find the source of this issue.

My car is Nissan Premiere and it uses Elecetric Carbueretor but I notice anytime I buy fuel it burn faster, I mean the fuel use to
ANSWER : If you are noticing a decrease in fuel mileage, there are a few things that you can check. The first thing I would recommend checking would be the air filter. If the air filter is dirty, this will cause the engine to use more effort during running and therefore decreases fuel economy. I would also check the level and condition of the oil. If the oil is black or low, the engine will also use more fuel due to extra effort required. Finally, I would recommend checking the tire pressures. The tire pressure going low can cause a major difference in fuel economy.

Fuel pressure
ANSWER : Hello,
You may want to try checking the fuel pump relay. The relay wires should have ground on two wires, power on one wire and switched power on another wire. To activate the fuel pump your ECU actually connects one of the ground wires to complete the circuit and send power to the fuel pump. If the wires all have power running through them, then it is likely you have a faulty relay. The wire coming from the fuel pump is the other ground wire. I would recommend having an expert from YourMechanic come to your location to diagnose your wiring as this can be very difficult and time consuming without the proper wiring diagram.

What type of fuel am I okay using?
ANSWER : An 89 octane fuel should work fine, granted a 91 octane is recommended. With having a turbo engine you may have harmful effects using a lower grade fuel due to what they call pre-detonation. This can occur under higher loads or speeding. The damage can result in damage to your turbo or possibly your engine.

the car is acting like its getting to much fuel. changed the fuel pump, fuel filter, and the fuel pump relay.
ANSWER : There could be a few things contributing to your problem. You are correct that clogged or sticking fuel injectors and possibly the fuel pressure regulator could be faulty. A plugged catalytic converter can also cause the vehicle to bog down. A failing throttle position sensor can cause the symptoms you describe as well. I suggest having a certified technician, like one from YourMechanic.com, do a few tests to determine the exact cause of your starting concern.

My car stutters after driving it for a few minutes – 2002 Toyota
ANSWER : This may also be caused by what is called the fuel pressure regulator. This is a unit that helps to maintain the fuel pressure at the proper level. When this is not working properly, the fuel pump may be pumping properly, but the fuel may not arrive at the fuel injectors at the proper psi. When this happens, this can cause a lean fuel condition which may cause the car to hesitate, misfire or stall. I would recommend having an expert from YourMechanic come to your location to diagnose your fuel pressure.