Heavy-duty diesel engine specs

    Oil capacities and service intervals copied from each engine maker's published manual, with the source on every table.

    Detroit DD13, DD15 & DD16

    Oil capacities and key maintenance intervals for Detroit's DD heavy-duty platform in on-highway trucks and coaches, from Detroit's own operator's manual.

    Cummins X15 (EPA 2024)

    Oil drain, fuel filter, DEF filter and overhead (valve lash) adjustment intervals for the EPA 2024 Cummins X15, from Cummins' own quick reference guide.

    PACCAR MX-13 & MX-11

    Oil and filter, fuel filter, coolant filter, DEF filter and DPF cleaning intervals for EPA 17/21/24 PACCAR MX engines, from PACCAR's published service-interval sheet.

    Volvo D11 & D13 (2017–2020)

    Oil and fuel filter drain intervals, coolant life and valve adjustment schedule for 2017–2020 Volvo D11/D13 trucks with the 42 L / 44 qt oil pan, from Volvo's Service at a Glance chart.

    Got a warning light? See commercial diesel fault codes.