>just installed a new fuel filter on my '91 Classic 2 >I got only 22.5 mpg the second, 23.5 mpg. >I'm used to getting between 26 and 27.5 mpg. If you changed the filter properly you disconnected the negative battery terminal. This resets the ECU. You will get crappy gas mileage for a tank of gas or two after doing this. -Jay