That does seem a little low.. Most likely O2 sensors.. Pre cat ones.. When i was stock i was getting between 18-20 on highway, and around 15 in the little towns around here... Now that i'm running bar lights, 2 inch lift and 33's on 3.73's, along with at least 1 bad 02 sensor, i'm barely breaking 10mpg
Save 1000 elk. Smoke a wolf pack
Sometimes the light at the end of the tunnel is a muzzle flash
I'm wondering if all these bad MPG's are part due to not calibrating your odometer after getting bigger tires. If I'm not mistaken if your off 10% in mph you'll be low 10% on your odometer mileage. My 32x11.5 run about 10% off so if I get 290 miles on the odo, I really did 319 miles. I just did a complete tune-up and sensor replacement to pass smog, I got a little over 18 MPG mixed driving with my 32"s and a 3 inch lift, I was quite surprized, I'm going to chack mine again with my GPS to make sure.
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