OK gear heads here are some questions?

[hillbill]

dude, drive the wheels off it!be glad yu got work.save up and pay cash for a better one in a couple years or keep driveing it till it drops.laugh at yur buds who are makin payments on their fancy crap wagons.18 mpg is pretty awesum for for a 4x4 of any kind.my nissan frontier 98 model with 4 cyl gits about that due to the low gears and wont haul or pull what yurs will.i thinking bout selling the nissan and buying a truck just like the one yu got that my brothers has, he like it a little much tho as far as the price tho. we still haggleing on that lol

[DalesCarpentry]

dude, drive the wheels off it!be glad yu got work.save up and pay cash for a better one in a couple years or keep driveing it till it drops.laugh at yur buds who are makin payments on their fancy crap wagons.18 mpg is pretty awesum for for a 4x4 of any kind.my nissan frontier 98 model with 4 cyl gits about that due to the low gears and wont haul or pull what yurs will.i thinking bout selling the nissan and buying a truck just like the one yu got that my brothers has, he like it a little much tho as far as the price tho. we still haggleing on that lol

If I were to be honest. I really only get 17.5 miles to a gallon. I have hit 17.7 though. I also drive about 70 MPH down the interstate and have at times reached 75 MPH or so. I wonder if I stuck to 65 MPH if I could improve upon my current millage? Dale

[R.W.Dale]

dude, drive the wheels off it!be glad yu got work.save up and pay cash for a better one in a couple years or keep driveing it till it drops.laugh at yur buds who are makin payments on their fancy crap wagons.18 mpg is pretty awesum for for a 4x4 of any kind.my nissan frontier 98 model with 4 cyl gits about that due to the low gears and wont haul or pull what yurs will.i thinking bout selling the nissan and buying a truck just like the one yu got that my brothers has, he like it a little much tho as far as the price tho. we still haggleing on that lol

If I were to be honest. I really only get 17.5 miles to a gallon. I have hit 17.7 though. I also drive about 70 MPH down the interstate and have at times reached 75 MPH or so. I wonder if I stuck to 65 MPH if I could improve upon my current millage? Dale

OH yeah! at least 1 or 2 MPG

[SHOOTALL]

I am the boss and all my trucks have a Radio , some Cd players , air etc .
 We expect 150000 miles and often get 185000 +

[Buckskins & Black Powder]

slow down to 55 and you'll get a good increase in MPG!  I average 21mpg doing 65 in a 92 isuzu rodeo and almost 27 when doing 55. I put bigger tires on now so im not to sure what thats going to do.  Went to 235 75r15 vs the factory 225 75r15.  My speedo is now 15mph slower.

[R.W.Dale]

Gblock according to this calculator your speedo error should only be 2% going from a 225 to a 235

if you're 15 mph off you've got some other issue going on

http://www.miata.net/garage/tirecalc.html