80's truck, V8 and good gas millage is a funny combination. I wouldn't even worry about it. Sure you can improve it a bit. But as said before from what 15 to 17 mpg? Saving a couple hundred bucks a year? Im sure you can save more on other ends of your business way quicker. As said here before if you want real good millage get a lil 4 banger import and your good to go. Otherwise just enjoy your truck the way it is. I love my 88 dodge W150, its doing everything Im asking for BUT saving gas!