As emissions limits and fuel economy targets become more stringent in markets around the globe, there has been an increased need for lower-viscosity heavy-duty engine oils to help meet those targets. Although many fleet owners and operators have been slow to adopt the currently available lower-viscosity engine oils, lubricant formulators are working to push viscosity down even further.
In a presentation at the Society of Tribologists and Lubrication Engineers’ Annual Meeting and Exhibition in May, John Pettingill, R&D product specialist for Petro-Canada Lubricants, said that the company had developed and demonstrated two prototypes of 0W-20 heavy-duty diesel engine oils.
Heavy-duty engine oils “are critical to providing engine protection and enabling longevity in heavy-duty diesel-powered engines,” Pettingill said. Because of this, at a minimum, heavy-duty diesel engine oils must be able to do the following things: