Exchanging propane tanks would certainly be faster than waiting 8 hours to refill your NG tank.
> If the vehicle runs out of natural gas on the road,
> it would have to be towed to the owners' home or one
> of the 100 California gas stations that now have
> natural gas refueling tanks.
So the owner hack on these will be a coupler for a
grill tank, and a chip mod for propane vs. NG, which
now puts the car within range of zillions of retail
stores with tank refill/exchange.
No SUVs?
Exchanging propane tanks would certainly be faster than waiting 8 hours to refill your NG tank.