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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.
In fuel-injected petrol engines, an electric fuel pump is typically located inside the fuel tank. For older port injection and throttle-body injection systems, this "in-tank" fuel pump transports the fuel from the fuel tank to the engine, as well as pressurising the fuel to typically 40–60 psi (3–4 bar).
Octane ratings are not indicators of the energy content of fuels. (See Effects below and Heat of combustion). They are only a measure of the fuel's tendency to burn in a controlled manner, rather than exploding in an uncontrolled manner. [6] Where the octane number is raised by blending in ethanol, energy content per volume is reduced.
Tyreek Hill celebrated a touchdown by taking a back-flipping selfie video Sunday. (Photo by Rich Storry/Getty Images) (Rich Storry via Getty Images)
Audiences are tuning back in to Vanderpump Rules. Following the news that longtime stars Tom Sandoval and Ariana Madix had split due to an alleged affair between Sandoval and co-star Raquel Leviss ...
Top Tier Detergent Gasoline and Top Tier Diesel Fuel are performance specifications and trademarks designed and supported by several automakers. [1] BMW, ...
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