otrfun wrote:
So, IMO, the question begs to be asked. Why are EPA MPG tests more accurate with some vehicles, and less so, with others? Consumer Report tests quite regularly note disparities between EPA and realworld MPG's.
There's probably no clear cut answer.
Manufacturers testing for EPA certification done on dynamometers. CR, which I'm no fan, of actually drives the vehicles. Can be argued that differences in test driver style/behavior make the difference, but I once read CR's description of their test procedures/protocols. Looked like they do all they can to keep the testing uniform.
