I can't really say as far as highway miles. We never really got the ones we used above 35MPH. Except for that occasional midnight high speed check. /forums/images/graemlins/shocked.gif The ones we had did have 3.08 gears in them, which seemed odd to me too, but it worked. It seemed like we could go about week before having to fill up. The Blazer had a 32 gallon tank. Pretty much all we did was drive around in circles, back and forth between building, and idle. Hope that helps a little. /forums/images/graemlins/tongue.gif
Kris