Engine protection and fuel economy.
API FA-4 specifically offers enhanced fuel economy for 2017 and newer engines.
API CK-4 aims to protect new and older engine models.
Both offer the following benefits over the previous standard, CJ-4:
- Improved shear stability
- Oxidation resistance
- Aeration control
- After-treatment compatibility
- Protection against catalyst poisoning
- Minimized particulate filter blocking
- Reduced engine wear
- Reduced piston deposits, degradation of low- and high-temperature properties
- Prevention of excessive soot load viscosity increase
- Emissions reduction
by Clinton J. Meyer
Technical Service Representative
ACS Certified in Chemistry and Biochemistry