Quote Originally Posted by ZR1Vette09 View Post
17.3... city driving? if so that's pretty normal.
well, its only about a 8 min highway trip, which it gets around 26 if i reset and cruise, but when im nearing the end of my highway stint, im getting 19. i drive 70, it shouldnt kill milage that much. i tested it out a few times, and i got better gas mileage at 65 than i did at 55. so replace both front o2 sensors eh?