I have found two interesting papers that seem to provide some answers to frequent questions on Ecomodder about some specific hypermiling techniques, and how those integrate with BSFC (brake specific fuel consumption).
1. "Coasting on Highways – Potentials and Realization" (
https://www.hs-heilbronn.de/5023311/...n-highways.pdf) by Prof. Hermann Koch-Groeber, Heilbronn University, Faculty of Mechanics and Electronics, Automotive Systems Engineering. June 2013.
2. "Criteria for Coasting on Highways for Passenger Cars", by Hermann Koch-Groeber and Jue Wang of Heilbronn University (ASE, as above). Published April 2014 by SAE.