Originally Posted by cadillackid
MPG example.. my little red bus is a 6 window shorty with allison 6 speed and T444E (7.3 V8 diesel) engine..
driving on mostly flat ground with not much wind..
if I drive it at 55-60. it stays in 5th gear and gets easily in the 13-15 MPG range..
if I drive 65 it goes in 6th gear.. shifts out if I step on it moderately.. and gets in the 10-12 range.
if I drive it 75 (maximum speed for my tires).. it stays in 6th more but wind resistance means it will downshift on most any incline.. and it gets 8-9.
so you can see that driving faster really hurts the MPG.. school busses are like a shoe box going down the highway.. not much aerodynamics. so your weather will greatly affect mileage..
ive had trips where i got close to 20 at 65 because I had such tail wind.. ive also had trips where I had to run it in 4th gear the whole trip because of headwinds and i got 5-6
Wow they have 4 2003 IC t444e for sale with 160k, maybe I need to research these.
Was not thinking about this engine since I heard it was gutless?
But I like the 2003 look more than the 2006 has the weird round hoods.
Here in California most of my trips consist of going uphill or to mountains to get to my campgrounds.