Product Overview

The K8 Performance Tier CI-4 is the high-performance workhorse of the ROCKEFELLER diesel engine oil portfolio — the product tier that serves the largest, most demanding, and most operationally critical segment of the global commercial diesel engine fleet. Formulated with high-quality synthetic base oil and an internationally advanced additive formula, the K8 is specifically designed for super heavy-duty turbocharged diesel engines — the engines that power the global economy’s freight, construction, mining, agriculture, and power generation infrastructure.

API CI-4 was introduced in 2002 (with CI-4 PLUS following in 2004) to address the lubrication challenges posed by the introduction of Exhaust Gas Recirculation (EGR) systems on diesel engines. EGR technology, mandated to reduce nitrogen oxide (NOx) emissions, creates significantly more demanding conditions for engine oil:

• Higher soot loading: EGR increases the amount of soot entering the oil by 50-200% compared to non-EGR engines
• Higher operating temperatures: Recirculated exhaust gases increase combustion and oil temperatures
• More acidic environment: EGR introduces additional acidic combustion byproducts into the oil
• Greater oxidative stress: The combination of higher temperatures and more reactive gases accelerates oil oxidation

The K8 is engineered to excel under all of these aggravated conditions, delivering reliable protection for EGR-equipped engines while maintaining the extended drain intervals, stable oil pressure, and clean-engine performance that commercial operators depend upon.

The K8 is manufactured with a five-year shelf life and is available in both 4-liter tins and 18-liter buckets.

Key Functional Features and Performance Benefits

★ Excellent High-Temperature Oil Film Strength — Improve Engine Power Output:
The K8 delivers outstanding high-temperature oil film strength — the ability of the oil to maintain a continuous, load-bearing lubricant film between moving surfaces even at the elevated temperatures generated by modern turbocharged diesel engines under heavy load. This high-temperature film strength is critical because:

• Bearing protection: Main and rod bearings in heavy-duty diesel engines experience extreme loads and temperatures. A strong oil film prevents bearing surface contact, reducing wear and preventing catastrophic bearing failure.
• Turbocharger protection: Turbocharger shaft bearings and thrust surfaces operate at temperatures exceeding 200°C and rotational speeds up to 200,000+ RPM. Maintaining oil film integrity at these extremes is essential for turbocharger longevity.
• Piston and ring protection: The piston ring/cylinder liner interface operates at the highest temperatures in the engine. Strong oil film presence at this interface reduces friction, wear, blow-by, and oil consumption.

By maintaining robust oil films at all operating temperatures, the K8 reduces internal friction and parasitic losses, allowing more of the engine’s power to reach the drivetrain. This translates to measurably improved engine power output, better acceleration under load, and more efficient operation.

★ Long-Lasting Stable Oil Pressure — Vehicle Easy to Handle:
Consistent, stable oil pressure is the foundation of reliable diesel engine operation. The K8 is formulated to maintain its designed viscosity characteristics throughout the entire drain interval, despite the viscosity-altering effects of soot accumulation, oxidation, fuel dilution, and mechanical shear. This long-lasting stable oil pressure:

• Ensures consistent bearing lubrication under all operating conditions
• Maintains proper hydraulic function of electronic unit injectors (EUI) and hydraulic valve lash adjusters
• Provides consistent turbocharger shaft bearing lubrication
• Delivers predictable engine behavior that makes the vehicle easy to handle — the operator experiences consistent power delivery, throttle response, and engine smoothness from one oil change to the next

For fleet managers, stable oil pressure also means stable oil analysis trending, making it easier to implement condition-based maintenance programs and catch developing problems early.

★ Excellent Acid Neutralization Ability and Anti-Oxidation Ability — Prolong Oil Change Interval and Save Costs:
The K8 features a high Total Base Number (TBN) reserve that effectively neutralizes the acidic combustion byproducts generated during diesel combustion — particularly sulfuric and nitric acids. This acid neutralization capability is critical because:

• Corrosion prevention: Unneutralized acids attack bearing surfaces, cylinder liners, and other precision engine components, causing corrosive wear that can lead to rapid and expensive engine damage.
• Extended drain intervals: The rate of TBN depletion is one of the primary factors determining when an oil change is required. The K8’s high initial TBN and efficient neutralization chemistry allow significantly longer drain intervals — reducing oil purchase costs, labor costs, vehicle downtime, and waste oil disposal volumes.

The K8’s advanced anti-oxidation system works in synergy with the TBN reserve, preventing the oil itself from breaking down and forming harmful oxidation byproducts (acids, sludge, varnish, carbon residues) that would otherwise accelerate wear and shorten drain intervals.

For commercial fleet operators, the K8’s extended drain capability delivers substantial cost savings:

• Typical mineral oil drain interval: 10,000–15,000 km
• K8 CI-4 synthetic drain interval: 30,000–50,000+ km (depending on operating conditions and fuel quality)
• Reduction in annual oil changes: 50-70%
• Associated savings in oil cost, filter cost, labor, and vehicle downtime

★ Effectively Control Corrosion, Wear, Engine Oil Sludge, and High-Temperature Deposits:
The K8’s comprehensive additive package delivers multi-faceted protection against the four primary forms of engine degradation:

• Corrosion control: Anti-corrosion additives form protective films on copper, lead, and tin bearing surfaces, as well as on ferrous components, preventing acid attack and electrochemical corrosion.
• Wear control: Advanced anti-wear additives form sacrificial tribofilms on high-contact-pressure surfaces, reducing metal-to-metal contact and extending component life.
• Sludge control: Powerful dispersants keep soot, oxidation products, and other contaminants suspended in the oil, preventing the formation of sludge that can block oil passages and starve components of lubrication.
• High-temperature deposit control: Robust detergent additives keep piston crowns, ring grooves, and undercrown surfaces clean of the carbon and varnish deposits that accumulate during high-temperature, high-load operation. Clean pistons maintain proper ring function, optimal compression, and efficient heat transfer.

★ Effectively Protect EGR — Meet Euro IV Emission Requirements for Diesel Engine Lubrication:
The K8 is specifically formulated to protect Exhaust Gas Recirculation (EGR) systems — the primary NOx reduction technology used in Euro IV and many Euro V diesel engines. EGR systems recirculate a portion of exhaust gases back into the intake manifold, reducing peak combustion temperatures and NOx formation. However, EGR operation creates significant challenges for the engine oil:

• EGR cooler fouling: Oil vapor and soot can deposit in EGR cooler passages, reducing heat transfer efficiency and eventually blocking the cooler
• EGR valve deposits: Carbon and varnish deposits on the EGR valve can cause sticking, leading to improper EGR flow rates and emissions non-compliance
• Increased oil contamination: EGR introduces additional acidic gases and soot into the oil

The K8’s formulation is optimized to minimize EGR system fouling while maintaining the oil’s ability to neutralize the increased acid load and disperse the additional soot generated by EGR operation. This ensures the EGR system continues to function efficiently throughout its service life, maintaining emissions compliance and avoiding the costly repairs associated with EGR system failures ($1,000–$5,000+ per repair).

Technical Specifications

Parameter	K8 CI-4
API Classification	CI-4 / CI-4 PLUS
Performance Tier	K8 (High-Performance)
Base Oil Type	High-Quality Synthetic
High-Temperature Oil Film Strength	Excellent
Oil Pressure Stability	Long-Lasting
Acid Neutralization (TBN)	High
Anti-Oxidation	Excellent
EGR Protection	Yes
Emissions Compliance	Euro IV
Soot Dispersancy	Advanced
Deposit Control	Excellent (Piston + Sludge)
Corrosion Protection	Comprehensive
Backward Compatibility	CH-4, CG-4, CF-4, CF, CE and earlier
Available Packaging	4L Tin, 18L Bucket, 208L Drum
Shelf Life	5 Years

Application Areas and Compatible Vehicles/Equipment

Super Heavy-Duty Turbocharged Diesel Engines (Primary Application)

• On-Highway Heavy Trucks: All major OEM platforms — FAW Jiefang, Dongfeng, Sinotruk HOWO, SHACMAN, Foton Auman, Beiben, CAMC, JAC (Chinese); Mercedes-Benz, Volvo, Scania, MAN, DAF, IVECO, Renault (European); Freightliner, Kenworth, Peterbilt, International, Mack (American); Isuzu, Hino, Mitsubishi Fuso, UD Trucks (Japanese); Hyundai, Tata-Daewoo (Korean/Indian)
• Medium-Duty Trucks: Isuzu Forward/FTR/FVR, Hino Ranger, Mitsubishi Fuso Fighter, Dongfeng Tianjin, FAW J6L, SHACMAN F2000/F3000 medium-duty, Foton Aumark, JAC Junling
• Light-Duty Commercial Diesel Vehicles: Toyota Hilux, HiAce; Nissan Navara, NV350; Mitsubishi L200/Triton; Ford Ranger, Transit; Mercedes-Benz Sprinter; VW Crafter; Isuzu D-Max, NLR/NMR/NPR light-duty trucks

Bus and Coach Operations

• Inter-City and Touring Coaches: Yutong, King Long, Golden Dragon, Zhongtong, Ankai, Foton AUV, Higer — all diesel coach platforms
• Urban Transit Buses: City bus fleets operating in urban environments with high stop-and-go duty cycles
• School Buses and Special Purpose Buses: School transportation, employee shuttles, medical transport, military personnel carriers

Construction and Mining Equipment

• Excavators: Caterpillar 320/330/345/390 series; Komatsu PC200/PC300/PC400/PC800 series; Volvo EC220/EC300/EC480 series; Hitachi ZX200/ZX350/ZX470 series; SANY SY215/SY365/SY485; XCMG XE215/XE370/XE490; Doosan DX225/DX340/DX520; Kobelco SK200/SK350/SK500; Liugong 920/936/970; Lonking CDM6225/CDM6365
• Wheel Loaders: Caterpillar 950/966/980; Komatsu WA380/WA470/WA500; Volvo L120/L150/L220; SDLG LG956/LG958; Liugong CLG856/CLG862/CLG886; XCMG LW500/LW600/LW800; Lonking CDM856/CDM858
• Bulldozers: Caterpillar D6/D7/D8/D9; Komatsu D65/D85/D155; Shantui SD16/SD22/SD32
• Cranes: Mobile cranes (Liebherr, Tadano, XCMG, Zoomlion, SANY); Tower cranes; Crawler cranes
• Road Construction Equipment: Asphalt pavers, road rollers, motor graders, milling machines (BOMAG, Wirtgen, Caterpillar, XCMG, SANY)

Agricultural Machinery

• High-Horsepower Tractors (100+ HP): John Deere 6R/7R/8R/9R series; Case IH Magnum, Puma; New Holland T7/T8/T9; AGCO/Massey Ferguson MF7700/MF8700; Kubota M7; Lovol P2504; YTO LX series
• Combine Harvesters: John Deere S700 series; Case IH Axial-Flow; New Holland CR; Lovol GE80/GF60; Zoomlion AF88; CFLD GK series
• Self-Propelled Sprayers: John Deere 4 series; Case IH Patriot; AGCO RoGator/TerraGator

Power Generation

• Prime Power and Standby Generators: Cummins (B/C/L/QSK/QST/KTA series engines); Caterpillar (C4.4/C7.1/C9.3/C13/C15/C18/C32); Perkins (400/1100/1200/1500/2500/4000 series); Volvo Penta (TAD/TWD series); MTU (1600/2000/4000 series); Yuchai (YC4D/YC6A/YC6B/YC6C/YC6K/YC6L/YC6MK); Weichai (WP4/WP6/WP7/WP10/WP12/WP13); Doosan (DP/DPU series)
• Application Sectors: Telecommunications tower backup, data center backup, hospital emergency power, industrial plant standby, construction site power, mining site power, military field generators, disaster relief power

Marine Applications

• Fishing Vessel Engines: Yuchai, Weichai, and Cummins marine diesel engines powering commercial fishing fleets
• Inland Waterway Vessels: River transport barges, ferries, and cargo vessels
• Coastal and Offshore Support Vessels: Supply boats, crew vessels, and utility craft

Target Customers and B2B Solutions

Large Commercial Fleet Operators: The K8 CI-4 is the volume leader in the ROCKEFELLER diesel range, designed for national trucking companies, logistics providers, construction companies, mining operators, and agricultural enterprises operating large fleets of heavy-duty diesel vehicles and equipment. The K8 delivers the critical combination of performance, protection, extended drain capability, and cost efficiency that large fleet operations demand.

National and Regional Distributors: The K8 is the anchor product for ROCKEFELLER diesel oil distribution — the SKU that generates the highest volume, the most consistent repeat orders, and the broadest market coverage. API CI-4 remains the dominant specification in the majority of the world’s diesel oil markets, making the K8 the product around which distributors can build their entire diesel lubricant business.

Construction and Mining Companies: Companies operating fleets of heavy construction and mining equipment (Caterpillar, Komatsu, Volvo CE, SANY, XCMG, etc.) require CI-4 grade lubricants that can handle the extreme conditions of construction and mining environments — high dust loads, extreme temperatures, extended operating hours, and heavy loads. The K8’s excellent deposit control, soot dispersancy, and high TBN reserve make it ideal for these applications.

Government and Military Fleet Maintenance: Government vehicle fleets, military logistics, and public works departments operating heavy diesel vehicles and equipment can standardize on the K8 for all CI-4 applications, simplifying procurement and ensuring consistent quality across diverse equipment types.

Agricultural Equipment Dealers and Cooperatives: Farm equipment dealers and agricultural cooperatives can offer the K8 as their premium diesel oil recommendation for high-horsepower tractors, combine harvesters, and other farm equipment where CI-4 quality is specified.

Power Generation Service Companies: Companies specializing in generator maintenance, rental generators, and standby power solutions can standardize on the K8 for all CI-4-specified generator engines.

Why Choose K8 CI-4 for Your Business?

1. High-Quality Synthetic Base Oil — delivers superior thermal stability, oxidation resistance, and extended drain capability
2. Excellent High-Temperature Oil Film Strength — protects bearings, turbochargers, and piston rings under maximum load conditions
3. Long-Lasting Stable Oil Pressure — ensures consistent engine performance and operator confidence throughout the drain interval
4. High TBN Reserve — neutralizes acids from combustion and fuel sulfur, preventing corrosive wear
5. Advanced Anti-Oxidation System — extends oil life and maintains cleanliness throughout extended drain intervals
6. Comprehensive Deposit and Sludge Control — keeps engines clean for maximum efficiency and minimum maintenance
7. EGR System Protection — prevents EGR cooler fouling and valve sticking, maintaining emissions compliance
8. API CI-4/CI-4 PLUS Certified — backward compatible with CH-4, CG-4, CF-4, CF, and all earlier diesel categories
9. Broadest Market Applicability — CI-4 is the world’s most widely used heavy-duty diesel oil specification
10. Optimized for Volume Distribution — competitive pricing with strong margin structure across multi-tier distribution networks