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

Viscosity is only one aspect of a heavy duty diesel engine oil. There is a complex mixture of various performance additives, coupled with select lubricant stocks that make up the engine oil.

“An old axiom in the lubricants business is to use the lightest ... introduced a split diesel engine oil classification to address the diverging needs of engines stemming from new on-highway ...

Diesel engine oil is typically more viscous than conventional ... and detergents which are all specifically tailored to provide the best lubrication, protection, and performance for each type ...