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Hey guys we have to better then this for the man. He has to beat the MPG of the Jetta TDI coworker. That much elevation change has to allow some evil mechanical/electrical gee-whiz thing get him better mpgs.
1) Can we think of some pressure vessel that doesn't weigh anything that sits in the trunk and "breaths-in" on the downhill and "breaths-out" on the uphill that generates heat and or electricity.
2) Or a way to install regen breaking on the downhill which again generates cabin heat or recharges the battery.
3) Flywheel?
Once you've gotten a realiable system (2) that generates electricity or heat on the downhill then you can add weight (Take out trash, fill a 10 gallon container with water, etc) that you take downhill with you every day but don't bring that weight back up the hill.
That is just half the ideas. The other ideas involve sabotaging the jetta to get worse miles (Nothing serious - just make him drive to lunch on those cold days so he has more cold start/short drives, etc).
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