Product Overview

The K9 Performance Tier CJ-4 represents the premium-grade fully synthetic diesel engine oil in the ROCKEFELLER diesel range, positioned immediately below the ultra-premium K10 (CK-4) tier. Built on a fully-synthetic base oil foundation with low-sulfur and low-phosphorus additive chemistry, the K9 delivers the complete performance package required by modern turbocharged diesel engines equipped with advanced exhaust aftertreatment systems.

API CJ-4 was introduced in 2006 and established the critical requirement for reduced SAPS (Sulfated Ash, Phosphorus, and Sulfur) content in diesel engine oils — a necessity driven by the widespread adoption of Diesel Particulate Filters (DPF) and other aftertreatment devices in response to increasingly stringent emissions regulations. The CJ-4 specification imposes strict limits on sulfated ash (≤1.0%), phosphorus (≤0.12%), and sulfur (≤0.4%), ensuring the oil does not compromise the function or longevity of these expensive and critical emissions control systems.

A defining characteristic of the K9 is its ultra-low evaporation loss — a measure of the oil’s tendency to vaporize at high temperatures. Low evaporation loss means less oil is consumed through the exhaust system, which in turn means:

• Reduced oil consumption between top-ups
• Less oil-derived particulate matter entering the DPF
• Lower emissions of volatile organic compounds
• Better long-term oxidation life (the light, volatile fractions that evaporate first are the ones that would otherwise oxidize and form deposits)

The K9’s strong soot containment capacity is another standout feature, effectively managing the high soot loads generated by modern EGR-equipped diesel engines. By keeping soot particles dispersed and preventing their agglomeration, the K9 avoids the cascade of problems caused by uncontrolled soot: oil thickening, abrasive wear, oil filter plugging, and oil passage blockage.

The K9 is manufactured to international standards with a five-year shelf life and is available in both 4-liter tins and 18-liter buckets.

Key Functional Features and Performance Benefits

★ Fully-Synthetic Base Oil — Ultra-Low Evaporation Loss, Better Oxidation Life, Long-Term Effective Engine Protection:
The K9’s fully-synthetic base oil provides a superior molecular foundation that resists evaporation at high temperatures significantly better than conventional mineral or semi-synthetic base oils. The Noack volatility of the K9 is dramatically lower than minimum specification requirements, meaning the oil retains its volume, viscosity, and protective properties over extended drain intervals. The synthetic base oil’s inherent resistance to oxidative breakdown means the K9 maintains a high TBN (Total Base Number) for longer, sustains its dispersancy and detergency performance, and avoids the formation of harmful oxidation byproducts (acids, sludge, varnish, lacquer) that degrade engine cleanliness and accelerate component wear.

★ Low-Sulfur and Low-Phosphorus Formula — No Effect on Engine Aftertreatment Devices (DPF):
The K9’s additive chemistry is specifically engineered with controlled low levels of sulfur, phosphorus, and sulfated ash, ensuring complete compatibility with Diesel Particulate Filters (DPF) and other aftertreatment devices. DPFs capture soot particles from the exhaust stream and periodically regenerate (burn off the accumulated soot) at high temperatures. However, the metallic ash derived from oil additives — particularly calcium, magnesium, and zinc-based compounds — cannot be burned off during regeneration and accumulates permanently in the DPF. Excessive ash accumulation reduces the DPF’s soot storage capacity, increases exhaust backpressure, triggers more frequent regeneration events (which wastes fuel), and can ultimately require costly DPF cleaning or replacement ($3,000–$10,000+ per unit). The K9’s low-SAPS formulation dramatically slows the rate of DPF ash accumulation, extending DPF service life and reducing fleet maintenance costs.

★ Excellent Anti-Wear Ability — Improved Lubrication Protection of Piston Ring-Cylinder Liner and Air Valve-Camshaft, More Durable Engine Life:
The K9 delivers targeted anti-wear protection to the two most critical wear interfaces in a diesel engine:

• Piston Ring to Cylinder Liner: This interface experiences extreme conditions — high temperatures, high pressures, limited oil supply, and corrosive combustion gases. The K9 forms a robust protective tribofilm on both the ring face and liner surface, reducing wear rates and maintaining the tight seal necessary for optimal compression, power output, and oil consumption control.
• Air Valve (Intake/Exhaust Valve) to Camshaft: The cam lobe/follower interface experiences some of the highest contact pressures in the engine, with boundary lubrication conditions prevailing during each valve actuation event. The K9’s anti-wear system provides exceptional protection at this interface, preventing the cam lobe pitting, follower scuffing, and valve train noise that result from inadequate lubrication.

The combined effect of this targeted protection is a measurably more durable engine with extended time between overhauls — a critical economic factor for commercial fleet operators.

★ Strong Soot Containment Capacity — Effectively Solve Problems of Abrasion, Engine Oil Thickening, and Oil Blockage:
Modern EGR-equipped diesel engines deliberately recirculate a portion of exhaust gases back into the combustion chamber to reduce NOx emissions. While effective for emissions control, EGR significantly increases the amount of soot that enters the engine oil. The K9’s advanced dispersant system provides strong soot containment capacity that effectively manages high soot loads by:

• Preventing soot-related abrasion: Individual soot particles are kept separated and coated with dispersant molecules, preventing them from forming larger abrasive aggregates that would accelerate wear on cylinder liners, piston rings, bearings, and valve train components.
• Controlling oil thickening: Soot-induced viscosity increase is one of the primary drain-limiting factors for diesel engine oils. The K9 maintains its viscosity grade even at soot concentrations of 3-4%+ (by weight), ensuring consistent oil flow, adequate oil pressure, and reliable component protection.
• Preventing oil passage blockage: By keeping soot dispersed in sub-micron-sized particles, the K9 prevents the formation of larger soot agglomerates that can plug oil filters prematurely, restrict flow through oil cooler passages, and block small-diameter oil galleries that feed critical components.

★ Excellent Viscosity-Temperature Characteristics and Shear Stability — Effective Control of Viscosity Changes and Stability of Oil Pressure:
The K9 demonstrates outstanding viscosity-temperature behavior (high Viscosity Index — VI), maintaining appropriate viscosity across the full operating temperature range from cold morning starts to sustained high-temperature highway cruising. The viscosity index improvers (VII) used in the K9 are selected for maximum shear stability, ensuring that the intense mechanical forces within the diesel engine — particularly in fuel injection systems, gear trains, and the ring/liner interface — do not permanently reduce the oil’s viscosity. This translates to rock-steady oil pressure throughout the entire drain interval, regardless of operating conditions or accumulated mileage/hours.

Technical Specifications

Parameter	K9 CJ-4
API Classification	CJ-4
Performance Tier	K9 (Premium)
Base Oil Type	Fully Synthetic
SAPS Level	Low-Sulfur, Low-Phosphorus (CJ-4 Compliant)
Evaporation Loss	Ultra-Low (Noack)
Aftertreatment Compatibility	EGR + DPF + DOC + SCR + TWC
Emissions Compliance	Euro IV
Soot Containment	Strong
Shear Stability	Excellent
Anti-Wear System	Targeted Ring/Liner + Valve/Cam Protection
Backward Compatibility	CI-4 PLUS, CI-4, CH-4 and earlier
Available Packaging	4L Tin, 18L Bucket, 208L Drum
Shelf Life	5 Years

Application Areas and Compatible Vehicles/Equipment

Luxury High-Speed Passenger and Commercial Vehicles (Euro IV)

• Mercedes-Benz: Actros, Arocs, Atego, Econic, Tourismo coaches; Sprinter and Vito commercial vans; E-Class, S-Class, GLE, GLS with diesel powertrains
• MAN: TGX, TGS, TGM, TGL truck ranges; Lion’s Coach and Lion’s City bus platforms
• Volvo: FH, FM, FE, FL truck series; Volvo 9900, 9700, 8900 bus and coach platforms; XC60, XC90, V60, V90 diesel passenger vehicles
• Scania: R, S, G, P, L truck series; Touring and Interlink bus platforms
• Isuzu: Giga, Forward, Elf truck ranges; Erga and Erga Mio bus platforms; D-Max and MU-X diesel SUVs
• DAF: XF, CF, LF series
• IVECO: Stralis, Eurocargo, Daily

Heavy-Duty Commercial Truck Fleets

• Chinese Truck Manufacturers (Euro IV+ Equipped): FAW Jiefang, Dongfeng, Sinotruk HOWO, SHACMAN, Foton Auman — all models equipped with DPF and SCR aftertreatment systems for National IV/V/VI emissions compliance
• Japanese and Korean Trucks: Hino, Mitsubishi Fuso, UD Trucks, Hyundai
• General Commercial Fleets: Long-haul logistics, regional distribution, refrigerated transport, tanker operations, and bulk haulage

Off-Highway and Industrial Applications

• Construction Equipment: Caterpillar, Komatsu, Volvo CE, Hitachi, Kobelco, SANY, XCMG, Zoomlion — Tier 3/4 emissions-compliant equipment
• Power Generation: Cummins, Caterpillar, Perkins, Volvo Penta, Yuchai, Weichai — Tier 3/4 generator sets
• Marine: Medium and high-speed marine diesel engines meeting IMO Tier II emissions standards

Target Customers and B2B Solutions

Premium Coach and Bus Fleet Operators: Inter-city coach operators, luxury tourism bus companies, airport shuttle services, and premium public transit authorities operating Mercedes-Benz, Volvo, Scania, MAN, Yutong, and King Long vehicles require CJ-4 quality lubricants that protect their significant aftertreatment system investments while delivering the long drain intervals essential for maximizing vehicle availability and revenue-generating operating hours.

National Distributors for Premium Diesel Markets: Distributors serving markets where Euro IV emissions standards are mandatory or being phased in (China National VI, India BS-VI, ASEAN Euro 4/5, Middle East, Latin America) need a premium CJ-4 product that serves as their flagship diesel offering. The K9 fills this role with international-grade performance at a competitive price point.

OEM-Aligned Workshops and Authorized Service Centers: Independent and authorized service centers specializing in European and Japanese commercial vehicles (Mercedes-Benz, Volvo, Scania, Isuzu, Hino) can adopt the K9 as their primary diesel service-fill product, particularly in markets where OEM-branded lubricants carry significant price premiums.

Mining and Heavy Industry: Mining operations and industrial facilities operating modern Tier 3/4 emissions-compliant equipment require CJ-4 lubricants. The K9’s strong soot containment and low-SAPS formulation provide the dual protection required for these demanding applications.

Why Choose K9 CJ-4 for Your Business?

1. Fully-Synthetic Base Oil — superior thermal stability, oxidation resistance, and low-temperature performance
2. Ultra-Low Evaporation Loss — minimizes oil consumption and exhaust emissions
3. Low-Sulfur, Low-Phosphorus Formula — protects DPF and all aftertreatment systems from ash accumulation and catalyst poisoning
4. Strong Soot Containment — manages high soot loads from EGR operation without oil thickening or component wear
5. Targeted Anti-Wear Protection — specifically engineered for the critical piston ring/liner and valve/camshaft interfaces
6. Excellent Shear Stability — maintains oil pressure and viscosity grade throughout extended drain intervals
7. API CJ-4 Certified — backward compatible with CI-4 PLUS, CI-4, CH-4, and all earlier categories
8. Euro IV Emissions Compliance — supports regulatory compliance for modern aftertreatment-equipped vehicles
9. OEM-Grade Quality — meets or exceeds the requirements of Mercedes-Benz, MAN, Volvo, Scania, and other premium OEMs
10. Competitive Premium Pricing — delivers international-grade CJ-4 performance at pricing that supports strong distribution margins