Hi, gas mileage problem too - it suddenly jumped from about mpg 28/37 to something 21/28 (92 XE) can't be only because of winter. air filter OK, fuel filter 1mo old, new tires (pressure OK). I checked the plugs and they have a plain light grayish color - all of them, and the color is 'nice' (solid, plain, no burns, no deposits etc, gap OK, electrodes not worn) Is this OK ? I used to know that plugs should be light brown. Can't remember plug type, some cheap walmart plugs, relatively new ones. thanks, T.
