Something can't be right!

[Vonbimmer]

Tough to say, I can't tell what engine you have but my 4.4 averages about 16.5-17.5 in town as long as I behave and about 21 mpg freeway. If your rolling a 4.4 as well I Would think about the pre cat O2 sensors if they have 80k+ on them.

[sasquatch]

Originally Posted by Vonbimmer

Tough to say, I can't tell what engine you have but my 4.4 averages about 16.5-17.5 in town as long as I behave and about 21 mpg freeway. If your rolling a 4.4 as well I Would think about the pre cat O2 sensors if they have 80k+ on them.

x2 on changing the O2 sensors. Those effect A/F ratio and resulting gas mileage will plummet if not working correctly.

My 4.4 has about 106K miles....totally stock engine (original plugs, O2 sensors, etc) and I'm seeing an average of 16pmg in heavy traffic. And I have a lead foot. My MPG only drops below that if I'm in hilly terrain or really bad winter weather.