Mercedes Mullins
Flex-fuel vehicles (FFVs) are designed to run on a blend of gasoline and ethanol, with the flexibility to use either fuel independently. E85, a blend of 51-85% ethanol, is a popular choice for FFV owners due to its lower price and reduced carbon emissions. However, E85 may not be suitable for all vehicles, and it is important to determine if your car is equipped to handle this fuel. While E85 is a great option for FFVs, it can damage traditional gasoline engines. This article will explore the compatibility of E85 with flex-fuel cars and the potential consequences of using it in non-FFVs.
Can I put E87 in a flex fuel car?
| Characteristics | Values |
|---|---|
| Can I put E87 in a flex fuel car? | Yes, you can put regular unleaded 87 octane gas in a flex fuel car. |
| What is a flex fuel car? | Flex fuel cars are vehicles that can run on flexible fuel, a blend of gasoline and ethanol. |
| What is E85? | E85 is a blend of ethanol and traditional gasoline, containing between 51% to 85% ethanol. |
| Is E85 suitable for all cars? | No, E85 is only suitable for flex-fuel vehicles (FFVs) that are either factory-built or retrofitted to flex-fuel. |
| How do I know if my car is a flex-fuel vehicle? | You can check your owner's manual, look for a flex-fuel badge or a yellow gas cap, or use your Vehicle Identification Number (VIN) to look up your car's specifications online. |
| What happens if I accidentally put E85 in a non-flex fuel car? | If you realise your mistake while filling up, stop pumping, turn off the engine, and add regular gasoline to dilute the E85. If you drove a short distance, you can continue driving and fill up with regular gasoline as soon as possible. If you drove a significant distance, it is safer to get your car towed and have a mechanic drain and refill the fuel tank with regular gasoline. |
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What You'll Learn
E85 vs E87: What happens if you put E85 in a non-FFV car?
E85 is a blend of gasoline and ethanol, containing between 51% and 85% ethanol, depending on the season and region. It is a type of flexible fuel, or "flex fuel", that can be used in dedicated flex-fuel vehicles (FFVs). These vehicles have modified internal combustion engines that can run on both traditional gasoline and ethanol blends.
E87, on the other hand, is regular unleaded gasoline with an octane rating of 87. It can be used in flex-fuel vehicles without any issues.
If you put E85 in a non-FFV car, it can be harmful to the engine. E85 burns leaner than gasoline, meaning there is more air than fuel in the mixture. This can confuse the sensors in the fuel system, leading to a sensor fault code. However, if the tank was already partially filled with regular gasoline (E87), the proportion of E85 would be diluted, and driving a short distance (around 45 miles) with this mix is unlikely to cause significant damage. In this case, you can simply fill up with regular gasoline (E87) going forward, and the E85 will continue to get diluted.
However, if you notice any engine issues like rough idling or the check engine light turning on, it is recommended to get your car checked by a mechanic.
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What is E85 gas?
E85 is a blend of ethanol and gasoline, with ethanol making up between 51% and 85% of the mixture. It is also known as flex fuel and is used in vehicles with modified internal combustion engines designed to run on more than one fuel. The higher ethanol content in E85 makes it a cleaner fuel than pure gasoline, resulting in reduced greenhouse gas emissions. Ethanol is typically derived from corn, making it a sustainable and domestically produced alternative to gasoline.
E85 is suitable for use in flex-fuel vehicles (FFVs) designated as such by the manufacturer. These vehicles can run on both ethanol-gasoline blends and regular gasoline. A badge with "Flex-Fuel", "FFV", or "E85" on the rear of the vehicle, or a yellow gas cap/yellow ring around the fuel filler hole, indicates compatibility with E85.
E85 is most commonly available in the Midwest region of the United States, where it is the preferred fuel for motor racing clubs and sports car enthusiasts due to its ability to increase torque and horsepower. The use of E85 is encouraged by the government through subsidies and infrastructure development.
While E85 typically costs less per gallon than regular gasoline, it results in lower fuel economy due to the lower heating value of ethanol. This means that more E85 is required to generate the same amount of power, resulting in a higher cost per mile. Despite this, E85 can be a cost-effective option for some drivers, depending on their location and energy market conditions.
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What is a flex-fuel vehicle?
A flex-fuel vehicle (FFV) is an alternative fuel vehicle with an internal combustion engine designed to run on more than one fuel. Typically, this is a blend of unleaded gasoline and ethanol, stored in the same tank. The engine can burn any proportion of the resulting blend in the combustion chamber. Modern flex-fuel vehicles are equipped with electronic sensors that gauge the blend and make any necessary adjustments.
Flex-fuel vehicles first became popular in the 1990s, and by 2022, there were over 20.9 million FFVs in the United States alone. FFVs are distinguished from bi-fuel vehicles, which store two fuels in separate tanks and run on one fuel at a time, such as compressed natural gas (CNG) or liquefied petroleum gas (LPG).
The most common commercially available FFV is the ethanol flexible-fuel vehicle, with about 60 million automobiles, motorcycles, and light-duty trucks manufactured and sold worldwide by 2018. The four biggest markets for FFVs are Brazil, the United States, Canada, and Europe, led by Sweden. In 2015, eight manufacturers offered more than 80 different FFV models to consumers.
While FFVs are more environmentally friendly and economical, there are some drawbacks. Ethanol contains less energy than gasoline, so it takes 1.5 times more to provide the same energy levels, resulting in lower fuel economy. Ethanol also absorbs dirt easily, potentially corroding and damaging the engine.
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How to identify a flex-fuel vehicle
Flex-fuel vehicles, also known as flexible-fuel vehicles (FFVs), are designed to run on gasoline or a blend of gasoline and ethanol, also known as E85. FFVs have been around since the 1990s, and many manufacturers started producing these vehicles to meet the demand for renewable and domestically produced alternative fuels.
- Look for a badge or decal: Flex-fuel vehicles may have a badge or decal with terms like "Flex-Fuel," "FFV," or "E85" on the rear of the vehicle or under the fuel door. This is an indication that the car is compatible with E85 fuel.
- Check the fuel cap: Many flex-fuel vehicles have a yellow fuel cap or a yellow ring around the hole where the fuel nozzle is inserted. This is especially true for model years 2008 and newer.
- Consult the owner's manual: The owner's manual will provide specifications on the type of fuel that can be used in your vehicle. It will also have information on the vehicle's engine and fuel system, which can help determine its compatibility with flex fuels.
- Check the vehicle identification number: FFVs may have a specific character in the vehicle identification number that indicates their compatibility with E85 fuel. This character can be found on the Vehicle Emissions Control Information label, usually located under the hood.
- Use an online tool: Websites like Pearson Fuels offer a flex fuel car checker tool that can help verify if your car is compatible with flex fuels.
It is important to note that while flex-fuel vehicles can run on regular unleaded gasoline, using E85 or other ethanol-blended fuels in a car not designed for flex fuel can be harmful. Always refer to the owner's manual or seek advice from a trusted mechanic if you are unsure about the type of fuel your vehicle requires.
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Can you put regular gasoline in a flex-fuel car?
Yes, you can put regular gasoline in a flex-fuel car. Flex-fuel vehicles are designed to run on alternative fuel sources, such as a blend of gasoline and ethanol, but they can also run on regular gasoline. This is because, aside from a few modifications to the fuel system, flex-fuel vehicles are very similar to regular gasoline cars.
Flex-fuel vehicles have internal combustion engines that can run on traditional gasoline and ethanol blends, such as E85, which is a blend of 51% to 83% (or 85%) ethanol, depending on the season and region. E85 is a popular alternative fuel source as it is better for the environment, cheaper, and reduces reliance on foreign oil. However, E85 also has a lower fuel economy than regular gasoline.
While flex-fuel vehicles can run on regular gasoline, it is important to note that you should not put diesel or regular leaded gasoline in a flex-fuel car. Additionally, E85 may cause issues with cold crank start-ups in cold weather, so it is recommended to use regular gasoline or a lesser amount of ethanol in winter.
It is always a good idea to refer to the owner's manual for specifications on the fuel to use in your vehicle.
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Frequently asked questions
Yes, you can put regular unleaded E87 gasoline in a flex-fuel car. Flex-fuel vehicles are designed to run on any blend of gasoline and ethanol, including E85, which contains a much higher percentage of ethanol than regular gasoline.
E85 is a blend of ethanol and traditional gasoline. It typically contains between 51% and 85% ethanol, depending on the season and region.
You can check your owner's manual or look for a badge with "Flex-Fuel", "FFV", or "E85" on the rear of your vehicle. A yellow gas cap or a yellow ring around the hole where the nozzle is inserted are also good indications that your car can use flex fuel.
E85 is a high-octane, eco-friendly fuel that offers reduced emissions and potentially better engine performance. It also costs less per gallon than regular gasoline.
