Under the new standard, testing is done with the minimum octane fuel required for that model.
Otherwise, don't pay the extra 15 to 20 cents per gallon for a higher octane fuel.
They featured modifications to deal with low octane fuel and high altitudes.
The benefits are more power and economy, but certain octane fuels have been seen to cause exhaust valve erosion.
These figures were all obtained on the contemporary low octane fuel.
The high octane fuel caught fire and the merchantman was abandoned.
High octane fuel was crucial to the high-performance planes that were developed in the late 1930s.
Due to ethanol's greater stability under pressure it is used by Shell in their 100 octane fuel.
It was designed to cope with low octane fuel and high altitudes.
Especially important were synthetic rubber and high octane fuel, which retained their importance after the war.
