Hello rsum63. I concur that Cyclone is a long play and not for short-timers. Definitely contact Carl about specifics on the WHE system for your work site.
About the automotive application. I expect the mpg of a vehicle powered by their Mark V to see average mpg greater than conventional automobiles (assuming all other factors equal - weight, drag, etc). The peak efficiency of the automotive system is slightly better than modern conventional gasoline automotive engines. But one advantage of this kind of engine is that there is less variation in efficiency over the power range vs. conventional gasoline engines that see a rather dramatic drop in efficiency at lower power levels. So, expect mpg to be particularly improved in city driving.
Because this is a new technology, data is virtually impossible to come by. But what I've been able to discover so far suggests that the friction levels of this engine is very low... and this to me is very promising. Also, I was told by representatives of the company that a vehicle prototype planned will include a regenerative braking system to help power engine auxiliaries. This will measurably improve city driving mpg as well.
IMO, the most endearing qualities of the automotive system are (in order of decreasing importance):
1. lack of fuel specificity
2. no emissions controls equipment
3. no transmission or clutch
Of course, the increased fuel economy over conventional automobiles is a bonus.
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