There are plenty of gas stations out there that happen to serve gasoline at a higher octane than 93. This is also common at race tracks. If you find yourself at one of these places, use the calculator below to figure out the correct mixture of the octanes to get to 93 octane.
Disclaimer - This calculator is provided for informational and educational purposes only. Results are estimates and are not guaranteed to reflect the actual octane rating of any fuel mixture. The final octane value will vary based on the specific fuel formulations, ethanol content, additives, and mixing conditions.
Use of this calculator is at your own risk. Find93 and its creators make no warranties, express or implied, regarding the accuracy, reliability, or suitability of these calculations and assume no liability for any damage, engine harm, performance issues, or other consequences resulting from the use of this information.
Never mix leaded fuel with unleaded fuel in vehicles equipped with catalytic converters or emissions equipment, as this can cause severe damage and may violate laws and regulations.
Always consult your vehicle manufacturer’s recommendations and use only fuels appropriate for your vehicle.
The simple average formula used in your octane calculator is generally valid for mixing gasoline octanes, assuming the fuels have similar ethanol content and additive compositions. Here's a breakdown:
Linear Mixing Principle: Octane ratings blend linearly by volume. For example, mixing equal parts 94 and 92 octane yields 93 octane because:
Ethanol Consideration: If both fuels have the same ethanol blend (e.g., E10), the formula holds. However, differing ethanol levels (e.g., E10 mixed with E15) could slightly skew results due to ethanol’s higher octane (~113). Most stations use consistent ethanol blends across octane grades, minimizing this issue.
Practical Accuracy: Real-world tests and automotive communities widely accept this method. Minor discrepancies might occur due to additive interactions, but these are typically negligible for everyday use.
Disclaimer Wisdom: Your disclaimer is prudent, as theoretical mixing doesn’t account for all chemical variables. However, the calculator provides a reliable baseline for users.
Example: To make 5 gallons of 93 using 95 and 91 octane:
Solving gives gallons of 95 and gallons of 91.
Conclusion: The calculator works under typical conditions and the math is sound for most real-world scenarios. Find93™ is not responsible for any damage caused by mixing fuels.
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