Is something wrong here?

[jnaut]

deliveries...all "city driving". I do my fair share of stop and go but I also do my fair share of just chuggin along around doin 30-45 as well. This past week on any given day the EVIC was saying that I was getting anywhere between 12-13 MPG.


Are my new wheels and tire really whats to blame for my terrible mileage?

-Ryan

In a word, yes. When I bought my '04 with stock 215's and I had a job where my commute were more of a mix of city/highway driving, I got between 17 and 20 mpg.

After I got my new job requiring a lot of start and stop driving (much like your situation, although probably not quite as intensive) and I got new 235's, my mileage went down to between the high 14's and the mid 16's. I too went through the "something must be wrong" phase, but I just came to realize that heavy city driving and bigger tires will reduce your mileage. And when you don't get great mileage to begin with, it doesn't take much to make it really bad. I found that I can increase my mileage if I really...*really* concentrate of careful accelleration I can keep it in the high 15's or low 16's.

 

[tjkj2002]

That was my other thought is difference in actual diameter., I'll check this later when my wife is back home as our spare tire is still the OEM spare (it has about 2,000 miles on it). I haven't put them on a scale, but i didn't feel a noticeable weight difference between the tires.

You will need to mount your spare on the vehicle or it will measure taller due to no weight being placed on it.

 

[Jeep dawg]

Yep the Moabs and bigger tires will show a lowere MPG
I have the same rims and 245/75/16 with firestone destination AT's. I am getting AVG of 13-15 city and about 17 hwy with my tires and rims

I am actually getting better than my old BFG at/ko tires. they were about 25 lbs more per tire than what I have now