Modern Chemistry, Lesson 70: Gasoline and Motor Fuels

Explains that a scale called octane number is used to rate the antiknock quality of gasolines. Normal heptane is given a rating of zero and iso-octane is given a rating of 100. Additives, such as tetraethyl lead, raise the octane rating of regular gasolines.

Sources

  1. Catalog of Classroom Teaching Films for Georgia Schools, No. 10 (Georgia Department of Education) — title, creator, length, description