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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. A minimum 82 octane fuel is recommended for most vehicles produced since 1984.
An octane rating, or octane number, is a standard measure of a fuel 's ability to withstand compression in an internal combustion engine without causing engine knocking. The higher the octane number, the more compression the fuel can withstand before detonating. Octane rating does not relate directly to the power output or the energy content of ...
Octane is commonly used as a solvent in paints and adhesives. N-octane is the octane isomer that has the longest carbon skeleton. Unlike its constitutional isomers, it has a very low knock resistance. The octane isomer, iso-octane, is used as one of the standards for octane ratings. It has a rating of 100 by definition.
The fuel-characteristics of a particular gasoline-blend, which will resist igniting too early are measured as the octane rating of the fuel blend. Gasoline blends with stable octane ratings are produced in several fuel-grades for various types of motors. A low octane rated fuel may cause engine knocking and reduced efficiency in reciprocating ...
To be certified as Top Tier, a gasoline must pass a series of performance tests that demonstrate specified levels of: 1) deposit control on intake valves; 2) deposit control on fuel injectors; 3) deposit control on combustion chambers; 4) prevention of intake-valve sticking. [4] Gasoline marketers agree when they sign on to Top Tier program ...
Whatcom gas prices. Whatcom County’s average cost of gas per gallon is currently $3.62 according to AAA data, one of the lowest averages in the state. Douglas County, in the center of Washington ...
Southern and Midwest states have some of the lowest prices in the country right now, with gas in Louisiana and Mississippi at $2.72. Texas, Arkansas, and Missouri drivers are paying just $2.76.
List of U.S. states by credit rating. This is a list of U.S. states by credit rating, showing credit ratings for sovereign bonds as reported by the three major credit rating agencies: Standard & Poor's, Fitch and Moody's. The list is given as of May 2021.