What Fleet Owners Need To Know About PC-11
by: Jim Urquhart, Lube-Tech
By now, you’re probably already using PC-11 or are about to. To date, ExxonMobil has accumulated more than 27-million miles of testing on its CK-4 and FA-4 PC11 diesel engine oil blends. The main thing fleet owners need to remember is there are two sub-categories, CK-4 and FA-4:
CK-4 – replaces CJ-4 oils, is a higher-viscosity blend with the high-temp, high-shear qualities needed for older-style diesel engines and is back-serviceable.
FA-4 – In order to meet increasing emissions and fuel efficiency standards, new diesel engine designs will benefit from using a lower viscosity engine oil. FA-4 does not have the same high-temp, high-shear qualities as CK-4 and is not back-serviceable.
Know Your Fleet
Fleet owners and managers should understand the needs of their fleet as well as OEM recommendations surrounding the engine oils required for operation.
CK-4 – can be used 2017 engines, and is backwards compatible with older engines as well for those who have a mixed fleet.
FA-4 – use in fleets operating newer, EPA 2017 engines only (depending upon engine manufacturer; follow OEM recommendations)
CK-4/FA-4 – mixed fleets may option to use both, but the CK-4 will cover new and old engine models.
Standardizing engines across fleets is best, but budgeting for in-house oil storage where both PC-11 blends are required is the best option for multi-use fleets.
How To Prepare
It is important to have your fleet’s maintenance department prepared for use of PC-11 diesel engine oils. Some recommendations include:
PC-11 will not change the best practices that have made many fleets successful. If anything, it should allow fleets to perform with better efficiency and fuel economy while allowing for a more data-driven approach to drain intervals and vehicle performance.