hydrocarbon blending value

hydrocarbon blending value

[¦hī·drə′kär·bən ′blend·iŋ ‚val·yü]
(engineering)
Octane number rating for a 20% blend of a hydrocarbon with a 60:40 mixture of isooctane: n-heptane, which has been recalculated for a hypothetical 100% concentration of the tested hydrocarbon.