antiknock blending value

antiknock blending value

[′an·tē‚näk ′blend·iŋ ‚val·yü]
(engineering)
The numerical improvement by an antiknock additive to gasoline octane, often a greater amount than the additive's own octane value.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.