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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.
Whether a higher octane fuel improves or impairs an engine's performance depends on the design of the engine. In broad terms, fuels with a higher octane rating are used in higher-compression gasoline engines, which may yield higher power for these engines. The added power in such cases comes from the way the engine is designed to compress the ...
With the price of regular unleaded gasoline still in the $4-a-gallon range, the comparative price of premium is kind of a bargain at many stations. Really. When the price of regular surged this ...
In 2013, PDVSA, Venezuelan state-owned company, spent US$1.7 billion in direct costs of importation of gasoline, and subsidizing all sales of gasoline in the internal Venezuelan market. The sale price of gasoline was US$0.015 [needs update] per liter, on a fixed price in the local currency that has been in effect since 1997. Given the low price ...
However, Gutierrez added that “…premium fuel provides no tangible benefits in fuel economy for most modern vehicles that run on regular unleaded gasoline.” Fuel Efficiency vs. Car Costs
The average cost of a used car is $26,510, according to Kelley Blue Book. While this is significantly less than what you can expect to pay for a new vehicle, it's still not exactly cheap. And with ...
The 50 ED95 buses had a cost of R$ 20 million (US$12.3 million) and due to the higher cost of the ED95 fuel and the lower energy content of ethanol as compared to diesel, one of the firms participating in the cooperation agreement, Raísen (a joint venture between Royal Dutch Shell and Cosan), supplies the fuel to the municipality at 70% of the ...
High octane value inhibits the fuel's tendency to burn nearly instantaneously (known as detonation or knock) at high compression/high heat conditions. However, in engines that utilize compression rather than spark ignition, by means of very high compression ratios (14–25:1), such as the diesel engine or Bourke engine , high octane fuel is not ...
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