Thanks for kind post
The T-Rose is based on a golf cart. It's a single cylinder engine which turned out to be the greenest on the playa (solar may have beaten us).
We used a bit over 2 gl of gas (TWO) over 3 nights & 3 days of playa cruising having at least 7 people riding it at any given time.
If I were to use electric cart, it'd take us 10gl(or more) to run generator to charge the batteries.