Maybe I just need to get a lot more miles on mine!

 

Mine's 4WD and I had it in Auto/4WD for a couple of hours of in-town driving due to icy conditions.

Normal highway driving for me is 65-75mph depending whether I'm in Oregon or Washington. About 2 hours of the 6 hour drive is on two lane highways with rolling terrain with a couple of 5 mile long passes. The other 4 hours are on Interstatesthathavevery gradual, rolling terrain. I did notice that once I cracked the 75mph barrier the mileage did start to go down.

The cruse control on these hoe's is awesome. My hoe powered up some fairly decent hills with style. Before my hoe I had a Tundra and when usingit's cruise, it wouldmotor along until a hill, then it would redlinewith no in between. It was obnoxious as hell.

 

What fuel gradeis everyone running? At $2.35 a gallonmore than likely86 only.
I put 100 miles a day on mine but avg out at 15.3. I went to NYC a few weeks ago and avg 18.3 after
3 hrs on the highway butdon't even touch that day to day.

 

Running 87 octane here in Colorado.

 

87 here in Dallas - Price is 2.12 and falling...

 

87. The Chevron across from my office is at 2.59, 2.69, 2.79. Last week the news reported that WAhas the 3rd highest gas right now. HI is #1, OR is #2.

 

Did your overall tire/wheel diameter get any bigger? If it did, then your numerical ratio went down which is going the wrong way. Might explain mpg decrease.

 

Shark, good point. I had thought about this, but I am not sure it is a big enough of a difference to make a change in the MPG. Here is the factory tires compared to the 24's. What do you think?


Sorry, the chart didnt post right, so I had to go in and manually fix it! Stock tires are the left column, right column is the 24's.



Stock Tire - 275/55R20
Tire 1 - 305/35R24





20" Section Width: 10.82 in 24" Section Width: 12.00 in

20" Overall Diameter: 31.90 in 24" Overall Diameter: 32.40 in

20" Sidewall Height: 5.95 in 24" Sidewall Height: 4.20 in

20" Radius: 15.95 in 24" Radius: 16.20 in

20" Circumference: 100.2 in 24" Circumference: 101.7 in

20" Revs per Mile: 652.0 24" Revs per Mile: 641.9

20" Actual Speed: 60 mph 24" Speedometer1: 59.0 mph


Speedometer Difference: 1.573% too slow


Diameter Difference: 1.55%

 

Mine is averaging 16.3 with 8000 miles. My computer has been very accurate. I did however discover that it can be very off on occasions. did you catch my post relative running out of fuel and the wacked out readings the computer had that lead me to run short?

https://chevroletforum.com/m_10890/tm.htm

 

I am afriad to look or figure out my mileage until I hit 5K miles. I have only seen the V4 twice and that was becasue I was coasting.