1 having the stated quality in relation to power or (of petrol, etc.) octane number:
2 a chemical substance in gasoline (= liquid fuel) which is used as a measure of its quality
A research octane number of 65 and volatility were low compared with modern fuels but probably suitable when considering the design of the flathead engine.
Volatility may have been low, but not such that the motor could not be operated, and the octane rating appears suitable for the engine.
By continuing arcing in liquid nitrogen with graphite electrodes, it is possible to accumulate the reaction products into the octane trap.
The products formed in the electric arc were hence forced to pass together with nitrogen into the octane solvent outside the reactor, and they were then trapped into the solvent.
The use of methanol as an octane improver is similarly uneconomic when compared to conventional improvers.
It seems that lead is the most efficient, the cheapest and the most plentiful octane improver.
It avoids the inefficiency of converting naphtha to high octane.
This plant was designed and built during the war to produce high octane aviation fuel from gas oil.
