Performance Plus Engine Oil
Performance Plus 644-55 Premium Plus 15W-40 CK-4 Heavy Duty Diesel Engine Oil
Performance Plus Engine Oil: Race-Proven Protection for Every Engine
When it comes to engine oil, few brands carry the kind of real-world credibility that Performance Plus has earned. Backed by over 30 years of innovation, research, and testing, Performance Plus motor oils were developed not just for the garage, but for some of the most demanding environments imaginable — from U.S. military combat vehicles to the high-banked turns of Daytona and the scorching straightaways of the Bonneville Salt Flats.
What Sets Performance Plus Engine Oil Apart
Proprietary base oil technology is at the core of what makes Performance Plus engine oil distinctive. The brand uses conventionally refined oils and proprietary, twice-refined oils, blended with industry-leading additives, to meet or exceed all industry certifications, licenses, approvals, and OEM warranty requirements. Central to this is their KLEEN+ base oil platform — premium full synthetic engine oils formulated from a combination of advanced quality performance additives and KLEEN+ Group III base oils, delivering extreme protection and performance.
Their comprehensive range meets or exceeds all North American standards for engine protection — API, ILSAC, and SAE — and is formulated to stand up against the toughest OEM requirements and specifications. For drivers who want the assurance of full synthetic protection, available grades include 0W-20, 5W-20, and 5W-30, with approvals covering Ford WSS-M2C962-A1, Ford WSS-M2C960-A1, Ford WSS-M2C961-A1, and General Motors 6094M.
From the Track to Your Driveway
Performance Plus has established deep roots in motorsport. The brand introduced the Richard Petty Signature Series™, formulated to perform in the most extreme conditions and to provide outstanding engine protection — products used in every car at Petty's Garage. Their racing pedigree extends further: Performance Plus served as the official oil partner of Roush Fenway Racing, one of NASCAR's most decorated teams.
That motorsport heritage isn't just a marketing story — "running our oil in military vehicles around the globe and in race cars across North America provides today's drivers with the confidence to use our oil in their everyday vehicles."
Sustainability and Quality You Can Count On
Using KLEEN+ base oils means reduced consumption of natural resources — it lowers your carbon footprint, increases your sustainability impact, and is better for your bottom line. Methodical testing and process control ensures exceptional quality and consistency across every product in the lineup, whether you're filling a daily commuter or a high-performance build.
- API SP / ILSAC GF-6A certified full synthetic formulas
- Proprietary KLEEN+ Group III base oils for extreme protection
- OEM approvals for Ford and General Motors applications
- Race-validated in NASCAR, ARCA, and Bonneville SpeedWeek
- Available in conventional, synthetic blend, and full synthetic formulations
Whether you're maintaining a daily driver or pushing a performance build to its limits, browse the full selection of Performance Plus engine oil to find the right viscosity and formulation for your application.