Even more importantly, diesel oil is generally more viscous, as the engines need more protection ... it coats the engine's moving internal parts with a film, preventing the parts from touching ...

Petro-Canada’s new Duron UHP 10W-30 provides improved performance and protection for heavy-duty fleets, the company said.

Petro-Canada Lubricants – an HF Sinclair brand – launched DURON UHP 10W-30, an ultra high performance full synthetic ...