Your numbers are also false for motorcycles (which all run on gas and not diesel...

epsylon on Oct 1, 2015 | parent | context | favorite | on: Study: Some car models consuming around 50% more f...

Your numbers are also false for motorcycles (which all run on gas and not diesel which is the subject of the conversation here). My BMW's 800cc rotax paralell twin does exactly that (4.5L cruising on the highway). Even the 1200cc boxer does that AFAIK.