I agree with some of the previous comments but I would expect yours to be lpg as there are very few operating on natural gas and U.S. terminology relates gas to gasolene ( petrol to us here in Australia ) The diesel engine used in that model was Mazda XA of which the numbers were not large and as of this date we as the major dismantler in Australia have not had one to dismantle. The next model H2.5 DX has the Mazda HA and as this unit does not have the same transmission as the XM series adaption would not be easy. ( we are dismantling 2.5 DX diesel units ) How about converting to operate on petrol as it should have been produced as a dual fuel machine , if not , items would be available to carry this out.