Re: Improves Engine Performance
higher octane fuels typically have less energy per gallon available, therefor lower mpgs.
and what he said.
also, no blanket statements are ever correct. 
2000 Honda Insight. Kenwood MP3 head unit, Blaupunkt door speakers, dual Cobalt amps, 3 MTX stealth subs, 4th very-high-mounted brake light, Sumitomo tires, yellow-top, hot induction air mod, tinted, SG2, MIMA, center armrest.

best tank 82 mpg
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