IN the last three weeks, heavy machineries like trucks, tractors, and excavators in Bukit Asam’s working area have been running on biodiesel 30 fuel. This blended fuel composed of 70 percent diesel and 30 percent bio content (palm oil and methanol) has also been used on locomotive and generator sets to fuel the trains of state railways company Kereta Api Indonesia (KAI). “It’s being tested at this point,” said KAI Spokesma