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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 ...
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.
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.
In the aftermath of Hurricane Katrina in 2005, the price of E85 rose to nearly on par with the cost of 87 octane gasoline in many states in the United States, and was for a short time the only fuel available when gasoline was sold out, but within four weeks of Katrina, the price of E85 had fallen once more to a 20% to 35% lower cost than 87 ...
This type of gasoline is known in Portuguese as Gasolina Aditivada (English: "Additived Gasoline") – Petrobras stations brand it as "Petrobras Grid"; [30] nevertheless, the octane rating is also 93 RON (these additives are used to improve the performance and efficiency of the engine, but they are not indicative of a higher octane rating).
Gas prices within the last 10 years highlight how volatile the market can be. When looking at historical data, gas prices were the same in 2011 as they were in 2023 — $3.52 per gallon.
The amount of ethanol used in the United States is also limited by the number of Flex Fuel vehicles available which are capable of operating on ethanol blends as high as 85% (E85) and the relative pricing of E85 as compared to regular gasoline (E10). Other alternative fuels may have higher functional "blend walls".
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 ...