Amazon.com: Triax Fleet Supreme ESP 5W-40 API CK-4 Full Synthetic Diesel Engine Oil, Friction Optimized and Boosted with Molybdenum and Nano-Boron, Compatible with Powerstroke Engines (1 Gallon) : Automotive
Miles Lubricants All Spec 15W-40 API CK-4, 5 Gal. Heavy Duty Diesel Motor Oil Pail M00200203 - The Home Depot
Rumex CK-4 SAE 15W/40 - Dyade Lubricants
Amazon.com: Ultra1Plus SAE 5W-40 Full Synthetic Heavy-Duty Motor Oil API CK- 4/SN (1 Gallon) : Automotive
PURUS® SYNTHETIC BLEND SAE 10W-30 API CK-4/SN ENGINE OIL