Quote:
Originally Posted by veinbar
My '79 SWB had a similar set up. Gas gauge not working in it either. If you know how many gallons your gas tank is, and your Odometer works, that's all you need. Example:
My truck had a 16 gallon tank, so I stopped at a gas station at or before 160 miles just to be safe(10mpg average). When you stop, write down the exact miles you traveled, and the exact gas amount that it took to fill your tank again. Divide the mileage by the gallons of gas, and you have your hwy MPG. Of course, my highway mileage was better than 10mpg but this is how I figured it out. If you're not getting 10mpg, turn around and go home. LOL
I used to get 15mpg with my edelbrock, but I switched to a SMI Q-Jet and now I get just under 18mpg. My engine is stock with the exception of open element air filter and dual 2.25" exhaust.
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I disagree with you that that would figure your highway mileage, It would figure your average milage when figuring that way.