I have had my Intercooled Magnacharger installed now for about 6 months and have seen a slight decrease in gas economy. Roughly a 1/2 mile per gallon decrease. However having the supercharger I tend to have my foot in it more often, blowing off the Z71 trucks. Having the additional power far out weighs the slight milage decrease. I would recommend the Magna SC to anyone. Good Luck!!!!
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