Octane rating is a method for describing antiknock properties of gasoline. Knocking is a pinging sound produced by internal combustion engines when fuel ignites prematurely during the engine's compression cycle. Because knocking can damage an...

An indication of the antiknock properties of a particular grade of PETROL; the higher the number the greater the antiknock property of that particular fuel. The number is generally determined variously in the laboratory, although there are also methods...

The octane rating is a measure of the autoignition resistance of gasoline and other fuels used in spark-ignition internal combustion engines. It is a measure of anti-detonation of a gasoline or fuel. Octane number is the number which gives the...

Very few cars today need the high octane grades of gasoline currently in the market because they do not have high compression engines. Only high performance sports cars and luxury automobiles require higher-octane gasoline. I can remember the pungent aroma of 104 octane...

Judged against Royal Dutch Shell's exceptional performance in the first quarter of 1996, its results for the first three months of this year were respectable enough. Current cost net income came in flat at pounds 1.54bn - bang in the middle of analysts' forecasts....

Q: Does it matter whether I fill my car with regular, medium-grade or premium gas?A: Probably not. Experts say most cars on the road will run just fine on regular _ even if the owners manual says a car "requires" premium gas."For the majority of...

Q: Does it matter whether I fill my car with regular, medium-grade or premium gas?A: Probably not. Experts say most cars on the road will run just fine on regular _ even if the owners manual says a car "requires" premium gas."For the majority of...