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Message: [QUOTE="TyCorr, post: 271676, member: 1451"] One of the.biggest that nobody ever mentions is air pressure in the.tires. Check weekly! In a matter purely interested in fuel.economy the stock airbox is fine. Fuel.economy has shti to do with high gas flow rates. Same for exhaust. A stock truck with maybe taller, not wider though, tires will.reduce.the.effective gear ratio and could reduce.rpms.for cruising. Honestly, ignore every mod. Air your tires.up to the.max +15-20%. That reduces rolling resistance. Keep the rpm output as low as you can to reach your speed desired. That speed should be 60mph or.less for maximum economy. Ditch anything you dont neex to.keep your overall weight minimized. If thisdoesnt gain something than your.driving technique is not.conducive to decent mpgs. Its no mystery that economy is putting out.the.least you have to to get your results desired. A tune will most likely ellicit aggressive throttle application from you. [/QUOTE]

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