There are theoretical hypothetical text book discussions, then there are "I tried a bunch of stuff and here's what I found..." type discussions. Recently I spent several months compiling and codifying 30+ years of trying stuff into an information source at
www.MPGenie.com. I don't have anything listed for sale. In fact, I share many products, but then send you to their sites to buy.
I will be conducting a 1-day Fuel Efficiency Basics 051 Training Class in the Stroudsburg, PA area on Saturday, December 10 at the Shawnee Resort if any of you want to attend (
www.MPGenie.com/051 for Class details).