I too have noticed my mileage getting worse lately. One thing you all need to remember too is that the gas companies (for the most part) temperature correct their gas (to 15Celsius here in Canada). What that means is when the temperature is below 15 and the pump says you got 50 litres, you really got less than 50 litres. The opposite is true in the summertime when the temp is above 15 Celsius (ie. you really get more than 50 litres). This'll help explain why if you track your mileage tank to tank, it's gone down, but won't explain why a full tank won't go as far as before (afterall, you still stop when the pump nozzle recognizes your tank is full). I'm at a loss to explain that, although I've always wondered if the winter additives in the gas affect it some how??
Black 98.5 SVT w/ KKM intake, 73mm MAF, ASP pulley, Optimized stock Y-Pipe, 24mm hollow rear sway bar, Magnaflow resonator, Magnaflow mufflers, Roush springs, KYB struts
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