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VHVI TECH is SK's proprietary oil technology that creates the benefits from SK's highest quality VHVI
base oil, YUBASE, and the additives of careful selection.※
VHVI : Very High Viscosity Index




Contains no harmful impurities in YUBASE interrupting additives performance, so provides better
engine cleasnliness and engine protection by cutting-edge additives.



VHVI TECH has much less light oil portion that vaporizes in hign temperature engine and leads to minimizing oil consumption and saving your money.


The API have established five Base Oil groups based on following indices.
Base Oil Category Sulfur(%)   Saturates(%) Viscosity Index
Group I > 0.03 and/or < 90 80 to 120
Group II ≤ 0.03 and ≥ 90 80 to 120
Group III ≤ 0.03 and ≥ 90 ≥ 120
Group IV All PolyAlphaOlefins (PAOs)
Group V All others not included in Groups I,II,III or IV
All YUBASE (with exception of YUBASE-3 and YUBASE-L3 both of which are Group II because their
Viscosity Index is below 120) are Group III category because:
Viscosity Index is above Group III limit of minimum of 120
Sulfur is typically below 10 ppm, below Group Ⅳ maximum of 0.03%
Saturates are typically 99%, above the Group III minimum of 90%
A convenient rule of thumb for classifying API Categories is :
Group I : Base oils produced by solvent extraction/solvent dewaxing
Group II : Base oils produced by severe hydrotreating
Group III : Base oils produced by hydrocracking and/or wax isomerization

YUBASE can be classified in many ways depending on the manufacturing process and
products characteristics :

- Group III Base Oil
- VHVI Base Oils (applies to base oils with Viscosity Index above 120)
- Hydrocracked Base Oil
- UCBO (UnConventional Base Oils) This usually applies to base oils with characteristics superior to API
       Group II base oils.

More info at our websitewww.yubase.com

Article reference: SK ZIC YUBASE


The choice of oil is very important for your engine. The most obvious function of the engine oil for lubrication, but the engine oil protects against corrosion and components of the engine and cleans the deposits and contaminants which may arise as by-products of combustion. Engine oil is also responsible for cooling. Therefore, we recommend that you make your choice without compromising on quality.