PT Global Makara Teknik is a private coal mining contractor that uses heavy dump truck model TL859 as a means of transporting overburden (OB). The use of B40 biodiesel fuel (40% biofuel and 60% diesel) in Indonesian mining companies is regulated in a series of government policies, namely Law No. 22 of 2001 concerning oil and gas, presidential regulation no. 191 of 2014, regulation of the Minist…