New Diesel Engine Oil Technologies Lead To Improved Performance and Efficiency

Photo by Josiah Farrow on Unsplash

Since the mid-1970s the U.S. government has taken on the role of setting standards for fuel efficiency and reduction of emissions. In 1975 Congress implemented Corporate Average Fuel Economy (CAFE) standards, which has been a driver for much of the change that has occurred in engine design during the past five decades. The trigger at that time was the OPEC oil embargo that caused shortages and a spike in fuel prices, so the initial standards were more focused on fuel consumption.

Efforts to reduce emissions gradually increased in importance in subsequent decades. Along with engine design improvements it became apparent that more advanced lubricants were needed to achieve the goals being required by the National Highway Transportation Safety Administration (NHTSA) and the Environmental Protection Agency (EPA)

Near the end of July Fleet Owner magazine published a story about emissions efficiency related to new diesel engine oil technologies. The aim of this story is to help fleet owners and managers understand the new formulations being introduced to satisfy global fuel economy targets. What follows are some highlights from this article.

An engine oil's main task is to reduce friction and ensure that moving parts are kept from coming in contact with one another. (This latter function is why film strength is increasingly important.) Oil is also necessary to transfer heat away from the engine and remove impurities and debris that might collect on critical parts.

With the technical advances taking place in diesel engine, driven by the need for greater efficiency, the lubricants are experiencing greater stress. Not only must they perform under harsher conditions for longer oil-drain intervals, they must do so in the presence of biofuels, without compromising protection.

In recent decades we've seen the introduction of significantly thinner oils for automobiles. It's been recognized that there are also gains to be made in the heavy duty truck market by means of lower-viscosity oils. How far can one go without compromising engine durability?

The rest of this article presents the results of field trials by Shell pertaining to fuel economy in Class 8 trucks. The data they have analyzed is drawn from 39 million miles of testing with CK-4 and FA-4 technologies. (See: Understanding CK-4 and FA-4) 

The first benefit is that lengthened oil drain intervals can result in major oil savings for fleets due to fewer oil changes. Using a higher quality oil, as opposed to one meeting minimum standards, drain intervals would nearly double and oil usage nearly cut in half.

A higher quality diesel engine oil is more impervious to oil breakdown, which makes longer oil drain intervals possible. The majority of these oils use synthetic or hybrid basestocks. The article details Shell's tiered offerings for the various engine types. You can find the Champion Brand diesel oils for your application here.

Related Links

Here's help to select the right diesel oil for your application:
www.DieselOilMatters.com

OEMs, Fleets Improve Performance and Efficiency with New Engine Oil Technologies