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Most states do not mandate certain standard gasoline grade octane ratings.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, the emission standards for non-road diesel engines are published in the US Code of Federal Regulations, Title 40, Part 89 (40 CFR Part 89). Tier 1–3 Standards were adopted in 1994 and was phased in between 1996 and 2000 for engines over 37 kW (50 hp). In 1998 the regulation included engines under 37 kW and introduced ...
The octane rating of gasoline is measured in a test engine and is defined by comparison with the mixture of 2,2,4-trimethylpentane (iso-octane) and normal heptane that would have the same anti-knocking capability as the fuel under test. The percentage, by volume, of 2,2,4-trimethylpentane in that mixture is the octane number of the fuel.
Gasoline distribution contracts in the United States generally have provisions that make offering E15 and E85 difficult, expensive, or even impossible. Such provisions include requirements that no E85 be sold under the gas station canopy, labeling requirements, minimum sales volumes, and exclusivity provisions.
There are a few factors contributing to today's falling gas prices. ... 800-290-4726 more ways to reach us. Sign in. ... due to factors ranging from nearby refinery supply to local fuel requirements.
The United States is divided into five Petroleum Administration for Defense Districts, or PADDs. These were created during World War II under the Petroleum Administration for War to help organize the allocation of fuels derived from petroleum products, including gasoline and diesel (or "distillate") fuel. Today, these regions are still used for ...
While U.S. gasoline demand is unlikely to rescale the pre-pandemic peaks of 2018 as the energy transition accelerates, the pace of its decline is uncertain, illustrating the challenge for industry ...
Gasoline prices are on a downward trend, with 11 states now averaging below $3 per gallon.The steady decline comes amid falling seasonal demand and use of less-expensive winter-grade gas.. Drivers ...