At 37.7 mpg for the last 2 tanks and and ~ a 35 mpg summer avg last year...and if the next full tank comes in at a similar level (3 tank avg)....I'll have managed a 7.8% gain from adding a cone filter....A-B test complete.
Warmer temps have probably helped though....
2003 Ford Focus ZX3 w/Zetec DOHC engine Gas Mileage (Elroy) - EcoModder.com
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