I'm consistenly getting in and around 26-28 mpg highway depending. This is at a very steady driving state. 72mph, cruise on, etc. Overall lets just say I think that I'm very impressed that the supercharger did not affect my mileage as negatively as first believed. I was told that most people tend to lose some mileage. My mileage was not affected as much and I'm very happy with what I get out of the car. However, if I drive in a more spirited manner I do pay the price at the pump which goes without saying.
2005 HP White GT - Auto - Red Leather Interior -Shaker 1000 - FR-500-S Axle Backs -Roush TVS 2300 Supercharged - GT500 Fuel pumps, GT500 TB, Aeroforce Dual Gauges, Performance Automatic 5r55S with hardened input shaft, PA 3000 Stall Converter , Dynotech one piece aluminum D/S, Roush Brakes,
FR3 Handling Pack and CHE LCA's and relocation brackets.
462 RWHP 443TQ