I "proclaim" that whatever he drove it would definitely be a 100% efficient engine and no parasitic loss from anything and switch from a Carnot to Wankle Rotary to Otto to Diesel to Stirling to to Brayton to and would run on everything from "water" to "wine" ...

--> Averaged 685 miles/week and 49.0 mpg in first year (35.7k miles from Aug 7, 2006 to Aug 7, 2007)