To: Mark 1
Its relatively simple to re-design a gas turbine for any combustible fluid fuel. I believe even fluidised coal dust has been demonstrated (not practically though).
The DD-963 class destroyers use gas turbines that were built for 747s and modified to run on bunker C oil that is extremely viscous. I was involved in the design but have no experience as to how the engines perform and if the maintenance rate is higher for the same engine on the 747.
In any case the oil came out of the ground which the original poster proposed should be replaced with an alternative fuel.
