How To Get 93 Octane With 91 And E85

Do you want more control over the performance of your vehicle? Are you looking to increase the octane rating of your fuel without breaking the bank? If so, you may be interested in combining 91 octane gasoline with E85 ethanol fuel to create a fuel mixture with a higher octane rating.

With this technique, you can get the benefits of a high-performance fuel without shelling out the extra cash for premium gasoline. Understanding the relationship between octane rating and fuel performance is essential to maximizing your vehicle’s performance. Octane rating measures a fuel’s ability to resist engine knock, which occurs when fuel ignites before it should, causing a loss of power and potential engine damage.

A higher octane rating means that the fuel can withstand more pressure and heat without detonating prematurely, resulting in smoother performance and reduced engine wear. By combining 91 octane gasoline with E85 ethanol fuel, you can increase the overall octane rating of your fuel and achieve a more powerful and efficient ride.

Understanding the Benefits of a Higher Octane Rating

You can feel the difference in performance when you use a higher octane fuel, with smoother acceleration and better overall engine performance. This is because high octane fuel burns more efficiently than lower octane fuel.

The higher the octane rating, the more resistant the fuel is to premature combustion, which allows the engine to operate at higher compression ratios without knocking or pinging.

One of the benefits of using high octane fuel is that it can improve engine performance. When the engine is running smoothly, it can produce more power, which translates to better acceleration and higher top speeds.

Additionally, high octane fuel can help reduce engine deposits, which can increase the lifespan of your engine and reduce the need for costly repairs.

Overall, using high octane fuel can help you get the most out of your vehicle and keep it running smoothly for years to come.

The Basics of E85 Fuel

So, you want to know the basics of E85 fuel? Let’s start with the fact that it’s a fuel blend containing up to 85% ethanol and 15% gasoline, making it a renewable and eco-friendly alternative to traditional gasoline.

But is it compatible with modern vehicles? The answer is yes, but not all vehicles are designed to run on E85. So, make sure to check your owner’s manual or with your manufacturer before fueling up.

Availability and cost are also important factors to consider. E85 may not be as widely available as gasoline and can vary in price depending on location and demand.

Ethanol Content

If you’re looking to boost the octane rating of your gasoline from 91 to 93, there are a few methods you can explore. One approach is mixing E85, a fuel blend containing 85% ethanol, with your current 91 octane gasoline. By introducing E85 to your 91 octane fuel, you can increase the ethanol content and subsequently raise the octane level to achieve 93 octane. It’s important to note that the ethanol content plays a significant role in determining the fuel’s octane rating. Now, when comparing the cost, you might wonder if E85 is cheaper than 93 octane gasoline. The answer largely depends on various factors such as availability, regional pricing differences, and government incentives. Generally speaking, E85 tends to have a lower price per gallon compared to conventional gasoline, making it potentially more cost-effective for increasing octane levels. As for the question of whether you can mix 91 and 93 gasoline directly, the short answer is yes. Mixing these two octane ratings can result in an intermediate octane rating between the two, albeit not exactly equal to 93. It’s important to be cautious when blending gasoline, as different fuel compositions can have varying effects on engine performance and efficiency. When considering ethanol content, it’s worth mentioning that 91 octane gasoline may contain up to 10% ethanol, whereas 93 octane gasoline usually contains little to no ethanol. This variation in ethanol content can influence the overall octane level and combustion characteristics of the fuel. In summary, if you’re aiming to achieve 93 octane from your 91 octane gasoline, one possibility is mixing E85 with your fuel. This can raise the ethanol content and subsequently increase the octane rating. However, it’s essential to be mindful of the ethanol content in different gasoline grades, understand the potential cost differences between E85 and 93 octane gasoline, and exercise caution when mixing different octane ratings.

With a higher ethanol content in E85, blending it with 91 octane gasoline can increase the overall octane rating of the fuel. Ethanol is a renewable fuel that’s produced from corn and sugar cane, making it an attractive option for those looking to reduce their carbon footprint.

Ethanol production has a lower environmental impact than traditional gasoline production as it emits fewer greenhouse gases and reduces our reliance on foreign oil. When blending E85 with 91 octane gasoline, it’s important to consider the ethanol content in the E85.

The ethanol content can vary between 51% and 83%, which can affect the overall octane rating of the fuel. By calculating the percentage of ethanol in the E85 and blending it with the appropriate amount of 91 octane gasoline, you can achieve a higher octane rating that’s suitable for high-performance engines.

With this knowledge, you can take control of your fuel options and customize your blend to meet your specific needs.

Compatibility with Modern Vehicles

Modern vehicles are designed to be compatible with E85 fuel, thanks to engine technology improvements and the widespread availability of flex-fuel vehicles.

The engine control unit (ECU) of modern vehicles is programmed to automatically adjust the fuel injection and ignition timing based on the ethanol content in the fuel. This means that the vehicle can run smoothly on E85 without any significant impact on engine performance.

However, it’s important to note that not all vehicles are compatible with E85. Some vehicles may require specific modifications or upgrades to the fuel system, such as larger fuel injectors or a different fuel pump, to handle the higher ethanol content.

Additionally, running E85 in a non-flex-fuel vehicle that is not designed for it can lead to engine damage and reduced engine performance. Therefore, it’s important to check the owner’s manual or consult with a certified mechanic before using E85 in a vehicle that is not labeled as flex-fuel.

Availability and Cost

If you’re looking to fuel up with E85, you may find that availability varies depending on your location and the types of gas stations in your area. While E85 is becoming more widely available, it’s still not as common as regular gasoline.

Additionally, some gas stations may not carry E85 due to the high cost of installing the necessary equipment to dispense it. When it comes to cost comparison, E85 is typically less expensive than regular gasoline. However, it’s important to keep in mind that E85 has less energy content than gasoline, so you may need to use more fuel to go the same distance.

Additionally, the cost of E85 can vary widely depending on your location. In some areas, E85 may be significantly cheaper than gasoline, while in others it may be more expensive. It’s important to compare prices in your area and calculate the cost per mile to determine whether using E85 is cost-effective for you.

Mixing 91 Octane Gasoline and E85 Ethanol Fuel

Combining 91 octane gasoline and E85 ethanol fuel can create a high-performance fuel with a higher octane rating. The ethanol in E85 raises the octane rating of gasoline, which increases the knock resistance of the fuel. This results in improved performance and power output in high-performance engines.

Additionally, the ethanol in E85 can also help to clean out deposits in the fuel system, resulting in improved fuel economy gains. However, it’s important to note that the exact ratio of gasoline to ethanol will depend on the individual engine and its requirements.

Too much ethanol can result in decreased fuel economy and potentially damage the engine. It’s recommended to start with a small percentage of ethanol and gradually increase the amount while monitoring engine performance. With careful experimentation and monitoring, combining 91 octane gasoline and E85 ethanol fuel can result in a high-performance fuel with improved performance and fuel economy gains.

Using the Fuel Mixture in Your Vehicle

To utilize the fuel mixture in your vehicle, it’s important to carefully monitor your engine’s performance and gradually increase the amount of ethanol while assessing any changes in fuel economy and power output.

Start by adding a small amount of E85, perhaps 10% to 20%, to your tank of 91 octane gasoline. Then, take note of any changes in your vehicle’s fuel efficiency and power output.

If you notice a significant dip in fuel efficiency or power, it may be necessary to decrease the amount of ethanol used.

It’s important to note that there may be potential drawbacks to using a fuel mixture of 91 octane gasoline and E85. The performance impact on your vehicle will depend on the engine requirements and design of your specific make and model.

In some cases, the use of E85 may lead to improved performance and fuel efficiency. However, in other cases, it may lead to decreased performance and fuel efficiency.

It’s important to carefully assess the impact of the fuel mixture on your vehicle’s performance and make adjustments as necessary.

Alternatives to Mixing Your Own Fuel

You can explore other options for fueling your vehicle without having to mix your own fuel. One option is to use fuel additives. These additives are designed to improve the performance of your fuel by increasing its octane rating.

There are many different types of fuel additives available, each with its own set of benefits. Some additives can help to reduce emissions, while others can improve fuel efficiency. If you’re looking for a quick and easy way to boost your fuel’s octane rating, then adding a fuel additive to your tank may be just the solution you need.

Another option is to use pre-mixed fuels. These fuels are already blended to achieve a specific octane rating, so you don’t have to worry about mixing them yourself. Pre-mixed fuels are available in a range of octane ratings, including 93 octane.

They’re typically more expensive than regular gasoline, but they can be a convenient option if you don’t want to deal with the hassle of mixing your own fuel. If you decide to use pre-mixed fuels, be sure to check the manufacturer’s recommendations to ensure that your vehicle is compatible with the fuel.


Congratulations! You’ve successfully learned how to mix 91 octane gasoline and E85 ethanol fuel to achieve a higher octane rating of 93. By understanding the benefits of a higher octane rating, you can improve your vehicle’s performance and save money on fuel costs.

As you mix the fuel, be sure to follow the correct ratios and safety precautions. Remember that this fuel mixture isn’t recommended for all vehicles and may void your warranty. Always consult your owner’s manual and a professional mechanic before making any modifications to your vehicle.

If mixing your own fuel isn’t an option, consider using premium gasoline or purchasing pre-mixed high octane fuel. With these alternatives, you can still achieve the benefits of a higher octane rating without the risks or complexities of mixing your own fuel.

Thank you for learning with us and happy driving!