Hi Herm, As Kirk says, during the Vetter Callenge running, close following is forbidden, P&G , EOC and other hypermiling driving techniques are discouraged. There is a ride leader and a designated follower ( usually Craig) and the Vetter Challengers are to stay riding between them. If the designated follower passes a competitor , they are eliminated for going too slow. One could try them during the run but at the risk of being passed by Craig and eliminated. The rides are on public roads , usually with hills and windy areas and the pace is usually "spirited". That is why breaking 100mpg is so difficult in the Vetter Challenges.