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Originally Posted by Moose
One of the awesome bennifits of those cars (5.7) is being able to use regular unleaded and still light them up! IMO - don't waste your money. The Middle East has enough of it. 
Moose. |
Curiously enough, most of the OPEC crude oil is heavy. Alaska north slope and west Texas are two places that produce light sweet crude. Premium contains more of the lighter components, as well as just more octane equivalent. So you might actually be using less OPEC stuff with the high-test.
Lighter more volatile gasoline will burn more easily. I'm not surprised if you get somewhat better gas mileage with it even if the knock sensor never comes into it. If the improvement is 10% or more, it pays for itself because the price difference of 93 vs. 87 octane around here in Connecticut is less than 10%.
