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Detroit diesel engines (Series 60, DD13, DD15, DD16)

Detroit, part of Daimler Truck North America, builds the DD13, DD15 and DD16 found in Freightliner and Western Star trucks. The earlier Series 60 was a long-running heavy-duty inline-six.

Detroit's coolant guidance specifies particular coolant types, a reminder to follow the maker's spec (see cavitation). Per Detroit and Wikipedia.

Blue Freightliner Cascadia sleeper semi tractor parked at a curb
A Freightliner Cascadia sleeper tractor. Photo: Oleg Yunakov, CC BY-SA 4.0 (resized), via Wikimedia Commons.

Common to all diesels

These apply to Detroit engines too.

Where this comes from

Last reviewed 2026-10-19. General information only: confirm with your service information and a qualified diesel technician.