These engines have run on all kinds of diesel, bio diesel, and vegetable diesel of 18,000 BTHU lb. All castings and pistons are made of a close grain cast Iron. We fit ours with tapered roller bearing mains these also use the Bosch micro fuel injection. They are solid, rugged time tested engines, that seem to run and run. These engines are built with care and pride by the workers at BASANT AGRA. They are built to last.