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What is the difference between 87 89 and 93 octane?

What is the difference between 87 89 and 93 octane?

What is the difference in octane levels? State laws regulate which octane levels can be listed as premium, midgrade or regular. Typically “regular” gas is 87 octane, “midgrade” is 89 octane and over 91 octane is “premium” gasoline. Some states label top-tier gasoline with 93 octane as “ultra” gas.

What’s the difference between 87 and 93 octane gas?

The common fuel ratings (87, for instance) refer to the composition of gasoline. 87-octane gasoline is comprised of an 87 percent blend of isooctane and 13 percent n-heptane, or a blend that’s equivalent. And so forth. Nearly every gas station in America will have some form of range from 87 to 93.

How to calculate the correct 93 octane mixture?

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 – I’ve never actually mixed gasoline myself, no clue what doing it does.

Which is better 85 octane or 10 percent ethanol?

As mentioned above, fuels with a higher octane rating reduce engine knocking and perform better. Also, almost all gasoline in the US contains 10 percent ethanol. When you mix 10 percent 113 octane ethanol with 85 octane gasoline it increases the octane two points to the normal 87 octane most consumers use.

Why does an engine have a higher octane rating?

The knocking or pinging in your engine occurs when the air/fuel mixture detonates prematurely. In broad terms, fuels with a higher octane rating are used in high-performance gas engines that have higher compression ratios.

Does higher octane burn cleaner?

The only benefit to a high octane fuel is that it allows an engine to run at a higher temperature and with a higher compression ratio without pinging. Higher octane fuel does not provide more energy, more power, better mileage, more torque, burn cleaner, clean your engine, and is not better for the environment.

Does premium gas help mpg?

Bottom line is premium gas won’t give you better mpg unless your engine can use the increased timing. And the timing increase is only really used under wot. Most people who switch to premium for mpg increase will see it, because they change their driving style during that time.

Does higher octane gas help?

For most vehicles, higher octane fuel may improve performance and gas mileage and reduce carbon dioxide (CO2) emissions by a few percent during severe duty operation, such as towing a trailer or carrying heavy loads, especially in hot weather.

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Ruth Doyle