The latest Confidence Report from Trucking Efficiency, a collaborative effort of the North American Council for Freight Efficiency and Carbon War Room, finds that Class 8 over-the-road fleets can realistically expect fuel savings in the range of 0.5% to 1.5% by switching from 15W-40 to 5W/10W-30 engine oil. That could be the currently available CJ-4 class or the newer CK-4 class available after December 2016.
