Concerning methods of measurement

[Matt Timion]

I have been thinking about this lately myself. I actually really like Ernie Rogers' way of testing MPG. he drives a straight stretch of road for 100-120 miles and then back. For him it's from Salt Lake City to Wendover (I think) Nevada. I think I may do the same test strip as him.

Highway driving such as this show gas mileage results in the best way. Set cruise control or have a target speed and stick to it. I may end up changing the "how to conduct an experiment" section to use this much easier method.

Now, there is also the concern of additives making their way through the gas tank. For that I say it's best to drive around for a few days after adding the additive, then fill up, and add the appropriate amount of the additive at the fill up before the test run. They say with acetone it takes 70 miles or so for it to work it's way though the system. Sounds doable to me.

IOW, I think you're right about the highway driving. too many variables are involved in city driving, and highway driving is always the same assuming you always use the same strip of highway, and the same speed.