Quote:
Originally Posted by deuce_roadster
Anything they sell us now is "swamp water" compared to when there was lead in the gas. What they sell as now as premium gas is lower in octane then regular used to be.
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Not necessarily true. The old leaded premium was 100 research octane. 93 super today is (87 motor + 99 research)/2. When unleaded gasoline came out they added the motor octane method to simulate city driving. High research octane doesn't guarantee performance in the city. Remember back in the day that some gasoline would cause cars to "run on" after the key was turned off? Minimum motor octane cures that as well.