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  2. Feds Investigating 877K GM SUVs & Trucks Over Reported V-8 ...

    www.aol.com/feds-investigating-877k-gm-suvs...

    The federal investigation covers select Chevrolet, Cadillac, and GMC trucks and SUVs built with the 6.2-liter L87 V-8 between the 2019 and 2024 model years. Feds Investigating 877K GM SUVs ...

  3. Internal combustion engine - Wikipedia

    en.wikipedia.org/wiki/Internal_combustion_engine

    With early induction and ignition systems the compression ratios had to be kept low. With advances in fuel technology and combustion management, high-performance engines can run reliably at 12:1 ratio. With low octane fuel, a problem would occur as the compression ratio increased as the fuel was igniting due to the rise in temperature that ...

  4. MTBE controversy - Wikipedia

    en.wikipedia.org/wiki/MTBE_controversy

    The MTBE controversy concerns methyl tert-butyl ether (MTBE), a gasoline additive that replaced tetraethyllead.MTBE is an oxygenate and raises gasoline's octane number.Its use declined in the United States in response to environmental and health concerns.

  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. Antiknock agent - Wikipedia

    en.wikipedia.org/wiki/Antiknock_agent

    In the U.S., where tetraethyllead had been blended with gasoline (primarily to boost octane levels) since the early 1920s, standards to phase out leaded gasoline were first implemented in 1973. In 1995, leaded fuel accounted for only 0.6% of total gasoline sales and less than 2,000 tons of lead per year.

  7. Pre-ignition - Wikipedia

    en.wikipedia.org/wiki/Pre-ignition

    A lean fuel mixture or excessive amount of oxygen in the combustion chamber; An engine that is running hotter than normal due to a cooling system problem (low coolant level, slipping fan clutch, inoperative electric cooling fan or other cooling system problem) Auto-ignition of engine oil droplets (Can be solved by using an oil catch tank) [3]

  8. Tetraethyllead - Wikipedia

    en.wikipedia.org/wiki/Tetraethyllead

    The current formulation of 100LL (low lead, blue) aviation gasoline contains 2.12 grams per US gallon (0.56 g/L) of TEL, half the amount of the previous 100/130 (green) octane avgas (at 4.24 grams per gallon), [85] and twice as much as the 1 gram per gallon permitted in regular automotive leaded gasoline prior to 1988 and substantially greater ...

  9. UAZ-452 - Wikipedia

    en.wikipedia.org/wiki/UAZ-452

    Notable in the van are the fuel ports on the left and the right side of the van, leading to two separate fuel tanks. [3] The engine, placed between the driver and the passenger seats, was the same 75 hp (55 kW) 2.4-litre (2,445 cc) UMZ-452MI inline-four as the UAZ-469, and was able to run on gasoline of as low as 72 octane (76 was preferred). [4]

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