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2. Octane rating - Wikipedia

   en.wikipedia.org/wiki/Octane_rating

   An octane rating, or octane number, is a standard measure of a fuel's ability to withstand compression in an internal combustion engine without causing engine knocking.The higher the octane number, the more compression the fuel can withstand before detonating.

3. List of U.S. states by standard octane ratings - Wikipedia

   en.wikipedia.org/wiki/List_of_U.S._states_by...

   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. A minimum 82 octane fuel is recommended for most vehicles produced since 1984. Older cars with carburetors could operate with lower octane fuel at higher elevations. Regardless of ...

4. 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 ...

5. Antiknock agent - Wikipedia

   en.wikipedia.org/wiki/Antiknock_agent

   Toluene and benzene were used as octane rating boosters for aviation fuel by the Royal Air Force in the World War Two. Tetraethyl lead was manufactured in the USA and was on short supply, so Rolls-Royce engineers built the Rolls-Royce Merlin to work with fuel affed with benzene and toluene. This was called as "aromatic fuel". [23]

6. List of gasoline additives - Wikipedia

   en.wikipedia.org/wiki/List_of_gasoline_additives

   Petrol additives may increase petrol's octane rating, thus allowing the use of higher compression ratios for greater efficiency and power, or act as corrosion inhibitors or lubricants. Other additives include metal deactivators, oxygenates and antioxidants. Some additives are harmful and are regulated or banned in some countries.

7. Octane - Wikipedia

   en.wikipedia.org/wiki/Octane

   Octane is a hydrocarbon and also an alkane with the chemical formula C 8 H 18, and the condensed structural formula CH 3 (CH 2) 6 CH 3. Octane has many structural isomers that differ by the location of branching in the carbon chain .