Planning to make a regression model... anyone else?

[bobc455]

Over the past few days I've been contemplating how much average speed affects gas mileage. So I've decided to conduct an experiment.

Turns out that my GPS has a feature that allows me to calculate moving average MPH over a given period. So from now on, every time I fill my tank I will record the miles, MPG, and the average speed for that tank. After I have enough data (probably 30 - 40 tanks), I'll make a linear regression model to see what the effect of average speed is on MPG.

(I know that MPG is not exactly linearly related to speed, but I'm just gonna force the data)

Anyone else want to do something like this? I'd be especially interested in getting a cross-section of different types of vehicles, including an SUV/pickup (F250, Suburban, that kind of thing) if there is anyone here who has one. I'll do the calculations, I just need you to do the record keeping.

(Of course the data would be messed up if you make any vehicle modifications, etc., so don't plan on making any changes. And obviously I'd need some way for you to calculate a moving average speed.)

-Bob C.