"Saving the Earth at 10 mpg" by Andy Baird. Source: Eureka! Live Blog. This is a great article about working toward a fuel efficiency + fun equation in RV life. As a first-time trailer owner, I am able to get a sense of the big picture - fuel efficiency as as set of skills and gear acquired over time - as well as the mathematical details of energy consumption for me to bookmark and refer to always. I shall write to Andy Baird to thank him. MATH IS POWER! Photo copyright Andy Baird.