In this installment it goes into more of the racing of diesel. How it can win races because of its fuel economy and how Gale Banks is trying to turn diesel into the “cool” thing. In the end he talks about the basics of do-it-yourself upgrades and how they can be beneficial which I’m sure anyone reading this already knows. Again I wish they wouldn’t mute out all the engine sounds, but it’s still great that such a popular site is doing this series.