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In the United States and Canada, octane ratings are in AKI, commonly shown as " (R+M)/2". All states require gas pumps to be labeled with the correct octane level and nearly all states do regular testing to make sure gas stations are in compliance.
In the United States and Canada, octane ratings are in AKI, commonly shown as " (R+M)/2". All states require gas pumps to be labeled with the correct octane level and nearly all states do regular testing to make sure gas stations are in compliance.
At the fuel testing lab we visited, they had standard engines for both RON and MON, and would blend their own standards from isooctane(100 in both standards by definition), n-heptane(0 in both standards by definition), toluene(121 RON, 107 MON per Wiki) and ethanol(108.6/89.7).
Nov 17, 2022 · The higher an octane number, the more stable the fuel. Retail gasoline stations in the United States sell three main grades of gasoline based on the octane level: Regular (the lowest octane fuel–generally 87) Midgrade (the middle range octane fuel–generally 89–90) Premium (the highest octane fuel–generally 91–94)
United States: in the US octane rating is displayed in AKI. In most areas, the standard grades are 87, 89–90, and 91–94 AKI. In the Rocky Mountain (high elevation) states, 85 AKI (90 RON) is the minimum octane, and 91 AKI (95 RON) is the maximum octane available in fuel. [76]
Oct 21, 2022 · The United States uses a fuel octane measurement system called the ‘AKI’ or ‘Anti-Knock Index’, also known as ‘DON’ or (R+M)/2. The same measurement system is also used in Canada and some other countries like Mexico.
People also ask
Are octane ratings required?
What is the octane rating of petrol/gasoline?
What is the octane rating for a gas pump?
Why are octane numbers lower in America than in Europe?
Feb 4, 2017 · In United States, I have understood that octane numbers are generally lower than in Europe for two reasons. Firstly, the gasoline is often genuinely lower-octane. Secondly, the numbers in United States don't mean the same thing as the numbers in Europe.
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