Gas burning 182: $443,500.  Diesel burning 182 (11 gallons per hour):  $515,000.  Difference $71,500.  Depending on assumptions, savings from  fuel repays capital cost in maybe 2000-3000 hours.  Interest on purchase load is 7%, and the annual cost for additional interest is about $5000.  Can you save this much per year to break even and save nothing?  Hmmmm....   Sounds unconvincing to me.   Going to have a marketing problem. 

 

However, in parts of Africa and elsewhere where there is no avgas and thus no other option....

 

F