I am not sure why anyone would want to burn anything but diesel in any diesel machine. Diesel products/fuels have all the (coctails) ingredients required for maximum performance and lubrication of internal components. Diesel engines will also burn combo fuels, vegetable oils and a few other configurations but for limited times and never with a warranty.
Recently we had many discussions about OEM parts. filters and lubricants and the consensus I thought was to stay with Kubots products and recommendations.