Fuel Economy Blows: Takin Lift Down and Moving to smaller tires: Question(s)
I just purchased a 2004 Excursion Limited. Its a Southern Car and is in excellent shape with relatively low miles @ 84K. I bought the vehicle for Wife to use as her DD. We needed something big and go Diesel for the F/E seemed to be the way to go. The vehicle currently has an 8" Superlift Kit with 37" Tires. The truck looks great and we love it (after many Suburbans/Yukons), however the "problem" is my F/E blows. I got 15mpg on the 700mile trip from GA to MI. City is just above single digits. I'm not sure if we'll even get 400 miles out of the 44 gallon tank in combined driving.
I am in the process of selling the lift kit and tires. I am planning on lowering it to stock or close to stock (2in.) and going with 18" wheels and 33" tires.
Questions: what is the widest tire that I can put on with the truck at stock height, without rubbing. I am considering the following tires: 325/60/18, 305/60/18 and 295/65/18: all are about 32.5-33.4" tall.
Anyone with estimates on how much F/E will improve with the tire change? Lowering? Will the 325 width yield much different fuel economy than the 295?
If you've done this or know of someone who has done this, please post your results.
Next step: tuner for F/E improvement.
Thanks in advance.