Views: 0 Author: Site Editor Publish Time: 2026-08-27 Origin: Site
As lubricant manufacturers face increasing pressure to improve formulation performance while controlling raw material costs, Group III+ VHVI base oil has become an important option for high-performance lubricant formulations.
ZMPC 4 cSt and 6 cSt VHVI Group III+ base oils are produced through deep hydroisomerization and hydrogenation refining, delivering high saturates, extremely low sulfur and stable viscosity characteristics.
The two viscosity grades are designed to provide formulators with a practical solution for applications traditionally relying on imported Group III+ base stocks, high-quality VHVI base oils or selected PAO components.
Modern lubricant formulations require more than simply matching viscosity.
Base oils need to provide:
High saturation level
Low sulfur and aromatic content
Good oxidation stability
Suitable viscosity-temperature behavior
Low-temperature fluidity
Good additive compatibility
Consistent batch quality
Competitive total formulation cost
For lubricant blending plants and private-label lubricant manufacturers, these characteristics are particularly important when developing engine oils, automatic transmission fluids, EV gear oils, hydraulic fluids, industrial gear oils and synthetic greases.
Group III+ VHVI technology provides a balance between performance, formulation flexibility and cost efficiency.
The 4 cSt VHVI base oil is a low-viscosity Group III+ base stock designed for formulations requiring reduced viscosity and improved fluidity.
Property | Typical Value |
|---|---|
Appearance | Clear, bright liquid |
Color | <0.5 |
Kinematic Viscosity @100°C | 3.714 mm²/s |
Viscosity Index | 108 |
Pour Point | -33°C |
Flash Point | 210°C |
Saturates | 99.8 wt% |
Sulfur | <0.0017% |
Acid Number | <0.01 mg KOH/g |
Noack Volatility | 21.76% |
The 4 cSt grade can be considered for:
Passenger car engine oil formulations
Semi-synthetic engine oils
Low-viscosity lubricant blends
Industrial hydraulic fluids
Compressor oils
Metalworking fluids
Textile and fiber lubricant formulations
Anti-rust oils
Cutting and stamping oils
Specialty lubricant formulations
For engine oil applications, 4 cSt VHVI is particularly useful as a low-viscosity blending component, rather than necessarily serving as the sole primary base stock for every formulation.
The 6 cSt VHVI Group III+ base oil is positioned as the more versatile grade for mainstream automotive and industrial lubricant formulations.
Its viscosity is closely aligned with the 6 cSt viscosity class commonly used in modern lubricant formulations, making it suitable for formulators seeking an alternative source of high-quality Group III+ base stock.
Property | Typical Value |
|---|---|
Appearance | Clear |
Density @20°C | 820.8 kg/m³ |
Kinematic Viscosity @40°C | 32.37 mm²/s |
Kinematic Viscosity @100°C | 6.207 mm²/s |
Viscosity Index | 144 |
Pour Point | -33°C |
Flash Point | 259°C |
Noack Volatility | 5.3% |
Aromatics | Not detected |
Sulfur | <0.5 ppm |
Water | 40 ppmw |
The combination of VI 144, 6.207 cSt viscosity at 100°C, 5.3% Noack volatility and ultra-low sulfur makes the 6 cSt grade particularly attractive for performance-oriented lubricant formulations.
For lubricant manufacturers developing 5W-30 and 5W-40 engine oils, 6 cSt Group III+ VHVI can serve as an important base stock component.
Potential applications include:
Full-synthetic passenger car engine oils
Gasoline engine oils
Commercial vehicle lubricants
High-mileage engine oils
Low-viscosity engine oil formulations
Motorcycle engine oils
The 6 cSt grade can also be combined with other base stocks to adjust viscosity, volatility and low-temperature performance according to the target formulation.
engine oil base stock, 5W-30 base oil, 5W-40 base oil, synthetic engine oil base stock, Group III+ engine oil base oil, low sulfur engine oil base stock, high VI engine oil base stock
The rapid growth of hybrid and electric vehicles is increasing demand for specialized transmission and drivetrain lubricants.
6 cSt Group III+ VHVI can be evaluated as a base stock component for:
Automatic transmission fluids
DCT fluids
Hybrid transmission fluids
EV reduction gear oils
Electric motor and drivetrain lubricants
Low-viscosity transmission lubricants
For EV lubricant formulators, the combination of high purity, low sulfur and controlled viscosity can provide a useful starting point for developing low-viscosity drivetrain fluids.
Final suitability should be validated through formulation testing, additive compatibility testing and the applicable OEM/API performance requirements.
Group III+ VHVI base oils are not limited to automotive applications.
The 4 cSt and 6 cSt grades can also be considered for:
Suitable as base oil components for:
Anti-wear hydraulic fluids
Low-viscosity hydraulic oils
Industrial hydraulic systems
Mobile equipment lubricants
6 cSt VHVI can be incorporated into formulations requiring:
Stable viscosity
Good thermal stability
Low volatility
Long service life
The high purity and low sulfur characteristics make these base oils suitable for evaluation in:
Screw compressor oils
Reciprocating compressor oils
Industrial air compressor lubricants
4 cSt and 6 cSt Group III+ base oils can also be used as components in synthetic and semi-synthetic grease formulations.
Potential applications include:
Lithium grease
Complex lithium grease
High-performance industrial grease
Bearing grease
Automotive chassis grease
Low-temperature grease
Blending the appropriate viscosity grade with higher-viscosity base oils or synthetic components allows formulators to fine-tune base oil viscosity, low-temperature performance and grease consistency.
For international lubricant manufacturers, sourcing flexibility has become increasingly important.
A qualified domestic Group III+ VHVI base oil can provide an alternative sourcing route for customers currently purchasing imported hydroisomerized base stocks.
Key commercial advantages include:
A domestic supply option can help lubricant manufacturers reduce dependence on premium-priced imported base stocks and optimize formulation costs.
Local production and shorter supply chains can support more predictable lead times for regular lubricant blending operations.
Bulk supply, drums and IBC packaging can support both domestic formulation plants and overseas lubricant manufacturers.
Controlled hydroisomerization and hydrogenation refining provide stable product characteristics and support batch-to-batch formulation consistency.
For customers currently evaluating imported Group III+ base oil, high-viscosity-index base oil or premium hydroisomerized base stock, ZMPC 4 cSt and 6 cSt VHVI provide an alternative source for formulation evaluation.
Typical replacement projects may involve:
Imported Group III+ → Domestic Group III+ VHVI
Premium VHVI → Cost-optimized VHVI
Selected PAO component → Group III+ VHVI blending solution
However, base oil replacement should always be evaluated through actual formulation testing rather than viscosity matching alone.
Recommended validation includes:
Kinematic viscosity
Viscosity index
Pour point
Noack volatility
Oxidation stability
Additive compatibility
Seal compatibility
Low-temperature performance
Finished lubricant performance testing
Application | Recommended Grade |
|---|---|
Low-viscosity blending | 4 cSt VHVI |
Semi-synthetic engine oil | 4 cSt / 6 cSt |
5W-30 engine oil | 6 cSt VHVI |
5W-40 engine oil | 6 cSt VHVI |
ATF / DCT fluid | 6 cSt VHVI |
EV reduction gear oil | 6 cSt VHVI |
Hydraulic oil | 4 cSt / 6 cSt |
Compressor oil | 6 cSt VHVI |
Industrial gear oil | 6 cSt VHVI |
Lubricating grease | 4 cSt / 6 cSt |
Our target customers include:
Manufacturers producing automotive and industrial lubricants who need reliable Group III+ base oil suppliers.
Companies producing passenger car engine oils, commercial vehicle lubricants, motorcycle oils and transmission fluids.
Formulators developing EV gear oil, e-drive fluid and hybrid transmission fluid.
Producers of hydraulic oils, gear oils, compressor oils, turbine oils and specialty lubricants.
Grease producers looking for high-purity synthetic or semi-synthetic base oil components.
Private-label and lubricant brands seeking competitive Group III+ base oil supply for international blending operations.
Many international lubricant formulators search for base oils based on performance descriptions such as:
high viscosity index
high saturates
ultra-low sulfur
low volatility
low-temperature performance
hydroisomerized base oil
Group III+ performance
premium synthetic lubricant base stock
PAO alternative
cost-effective synthetic base oil
These performance-oriented requirements are more useful for technical evaluation than simply comparing product names.
ZMPC 4 cSt and 6 cSt VHVI base oils are therefore positioned as formulation-oriented Group III+ base stocks, enabling customers to evaluate domestic supply as part of their existing base oil portfolio.
If you are looking for a 4 cSt or 6 cSt Group III+ VHVI base oil supplier, ZMPC can provide product specifications, COA, SDS and samples for formulation evaluation.
Contact us for:
4 cSt VHVI base oil
6 cSt VHVI base oil
Group III+ base oil supply
Hydroisomerized base oil
PAO alternative evaluation
Engine oil formulation base stock
ATF / DCT base oil
EV gear oil base stock
Industrial lubricant base oil
Bulk export supply
Tell us your target viscosity, application, formulation requirements and annual volume, and our technical team can recommend the appropriate base oil grade.
4 cSt Group III+ VHVI is a low-viscosity hydroisomerized base oil designed for lubricant formulations requiring good fluidity, high purity and controlled viscosity.
6 cSt Group III+ VHVI is commonly evaluated for engine oils, ATF, DCT fluids, EV gear oils, hydraulic fluids, compressor oils, industrial gear oils and synthetic greases.
In selected lubricant formulations, Group III+ VHVI can replace part of the PAO content depending on the required performance, formulation architecture and finished-fluid specifications. Actual formulation testing is required.
The primary difference is viscosity. 4 cSt is better suited to low-viscosity blending applications, while 6 cSt provides a broader formulation window for engine oils, transmission fluids and industrial lubricants.
Yes. 4 cSt and 6 cSt VHVI base oils can be supplied for overseas lubricant manufacturers, blending plants and distributors, subject to packaging, order volume and destination requirements.
It can be evaluated as a domestic alternative sourcing option for selected imported Group III+ / VHVI base oils. Final replacement suitability depends on formulation and performance testing.
