DURON UHP 10W-30 from Petro-Canada Lubricants is an ultra-high performance synthetic heavy-duty diesel engine oil designed to meet the demands of modern heavy-duty engines. The low viscosity engine oil delivers up to 1% improved fuel economy compared to an SAE 15W-40, helping fleets cut costs and reduce their total cost of ownership. Combining exceptional fuel efficiency and ultra high protection, DURON UHP 10W-30 safeguards engines against harmful sludge, deposit build-up, and wear, increasing durability and reliability over time.