I just filled up my 3rd tank, my first tank averaged about 16.3 miles per gallon. I installed my loadwarrior and bike rack before my second fill up (loadwarrior, x-towers,crossbars and 2 bike racks on the roof) my mpg dropped to 14. I am now getting worse mileage then I was in my 2001 Xterra. I know its too soon to tell but does anybody have any recommendations other than tire pressure and air filter. I hope this trend isn't going to continue.