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  1. www.fueleconomy.gov › feg › octaneSelecting the Right Octane Fuel - FuelEconomy.gov

    Octane rating is the measure of a fuel's ability to resist "knocking" or "pinging" during combustion, caused by the air/fuel mixture detonating prematurely in the engine. In the U.S., unleaded gasoline typically has octane ratings of 87 (regular), 88–90 (midgrade), and 91–94 (premium). Gasoline with an octane rating of 85 is available in ...

  2. driving.ca › auto-news › newsWhich Type of Gasoline is Best for Your Car? | Driving

    Sep 14, 2016 · Ethanol-enhanced gasoline is indicated by a number: E10, for example, is 10 per cent ethanol mixed with 90 per cent gasoline, a blend Natural Resources Canada says is safe for most engines. If you ...

    • Jil Mcintosh

  3. engineaddiction.com › compression-ratio-fuelCompression Ratio Fuel Octane Chart: (All You Need To Know)

    Nov 20, 2022 · Clearance volume = 0.000cc [ (bore/2)2 x π x deck height x 16.387]. Since the formula is long and tedious, click this link for an Omni compression ratio online calculator. 2. Use of a manometer. Using a manometer is much simpler, as you won’t have to open the engine block.

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  5. www.yourmechanic.com › article › which-type-octaneWhich Type (Octane) of Gas Is Recommended for My Car?

    Nov 24, 2015 · First, open the fuel filler door. Next, look at the gas cap and the inside of the fuel filler door. One of these should have the recommended octane fuel for the vehicle written on it. The typical way the recommended fuel octane is listed is as follows: XX Octane (sometimes “AKL” is put in place of octane) recommended. XX Octane minimum.

    • Ian Swan

  6. www.cargurus.com › Cars › articlesChoosing the Right Gas for My Car - CarGurus

    Jul 15, 2021 · Premium vs. Regular. Unleaded gas is considered "premium" or "regular" depending on its octane level. This determination can vary state to state, but typically, gas with a higher octane rating, above 91, is considered premium. An octane level of 87 is considered regular. Mid-grade gas (octane number 89) splits the difference between regular gas ...

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  7. fuelconsumptioncalculator.com › what-octane-fuelwhat octane fuel should i use - FuelConsumptionCalculator.com

    Aug 22, 2024 · But, using a higher octane than needed won’t help most standard cars. Premium gas, typically 91-93 octane, is best for high-performance engines and vehicles that need it. Regular gas, 87 octane, is what most cars use. Some cars need at least 91 or 93 octane, as shown in the owner’s manual or fuel filler door.

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  9. shop.advanceautoparts.com › r › adviceDoes the Type of Gasoline You Use Really Matter? | Advance ...

    The price per gallon rises in tandem with the fuel grade. Depending on what you drive, these grades — or octane ratings — matter. For starters, high-performance engines need higher octane fuel. That’s because your engine was designed to generate higher compression within the cylinder and increased power. Higher pressure and lower octane ...