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An antiknock agent is a gasoline additive used to reduce engine knocking and increase the fuel's octane rating by raising the temperature and pressure at which auto-ignition occurs.
Fuel additives in the United States are regulated under section 211 of the Clean Air Act (as amended in January 1995). The Environmental Protection Agency (EPA) requires the registration of all fuel additives which are commercially distributed for use in highway motor vehicles in the United States, [8] and may require testing and ban harmful additives.
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.
As anti-knocking agent [ edit ] In the U.S. MTBE has been used in gasoline at low levels since 1979, replacing tetraethyllead (TEL) as an antiknock (octane rating) additive to prevent engine knocking . [ 16 ]
One result of those slack prices is that U.S. average pump prices for gasoline fell to $3.03 a gallon this week, the lowest since May, 2021 and well down from their record peak of $5.02 from June ...
Today's spangram answer on Saturday, December 14, 2024, is GOGETTER. What Are Today’s NYT Strands Answers, Word List for Saturday, December 14? DRIVE. INTENSITY. PURPOSE. DEVOTION. PASSION.
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 ...
A total of €1.8 million ($1.9 million) in cash was sequestered in the operation carried out by 300 anti-mafia officers and special police dogs used to sniff out drugs and cash in several ...