VW has already produced a {small, inline} car which exceeded 100kms/l (235 miles/gallon).  As that knowledge and technology (such as carbon fibre vehicle bodies) shifts into production vehicles, 80litres/day could be a lot of fuel ;-)

On 09-Jul-2015, at 21:40, Mark Hersh wrote:

> Yes, it would seem like it would take acres and acres and acres of solar
> panels to produce enough energy to produce 80 L of diesel per day from
> water and CO2.
> 
> On Thu, Jul 9, 2015 at 4:44 PM, Dave Mcneely <mcneely4@cox.net> wrote:
> 
>> John, John, John.  Not so fast.  The process requires hydrolysis of water
>> to provide the necessary hydrogen, a high energy demand reaction.  We are
>> talking about serious energy inputs above the energy storage in the fuel.
>> While it may be a way to produce fuel, the energy it consumes could be more
>> readily used directly for other applications much more profitably,
>> methinks.  mcneely
>> 
>> 
> 
>