hypermiler
v.— «Hypermilers almost always run with the least amount of fuel burned in any number of circumstances.…Even using interior heat is a luxury an Insighter had better reconsider if he is considering Hypermiling year round.» —“The Black Variant of Death and Rammstein” by Waye Gerdes in Illinois GreenHybrid Aug. 15, 2004. (source: Double-Tongued Dictionary)