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2. Antiknock agent - Wikipedia

   en.wikipedia.org/wiki/Antiknock_agent

   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.

3. Methyl tert-butyl ether - Wikipedia

   en.wikipedia.org/wiki/Methyl_tert-butyl_ether

   An alternative to ethanol is ETBE, which is manufactured from ethanol and isobutene. Its performance as an additive is similar to MTBE, but due to the higher price of ethanol compared to methanol, it is more expensive. Higher quality gasoline is also an alternative, so that additives such as MTBE are unnecessary. Iso-octane itself is used. MTBE ...

4. List of gasoline additives - Wikipedia

   en.wikipedia.org/wiki/List_of_gasoline_additives

   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.

5. Gasoline - Wikipedia

   en.wikipedia.org/wiki/Gasoline

   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 ...

6. Tetramethyllead - Wikipedia

   en.wikipedia.org/wiki/Tetramethyllead

   Tetramethyllead, also called tetra methyllead and lead tetramethyl, is a chemical compound used as an antiknock additive for gasoline. [1] Its use is being phased out for environmental considerations. [2] The National Institute for Occupational Safety and Health (NIOSH) in the United States has identified tetramethyllead as a potential ...

7. Tetraethyllead - Wikipedia

   en.wikipedia.org/wiki/Tetraethyllead

   Tetraethyllead (commonly styled tetraethyl lead), abbreviated TEL, is an organolead compound with the formula Pb(C 2 H 5) 4.It was widely used as a fuel additive for much of the 20th century, first being mixed with gasoline beginning in the 1920s.