HKS Super Oil HR -4W-31 4L

Engine Oil Developed Targeting Specific Engines.
HKS Super Oil series were developed on the concept of "engine oil is one of the engine part".
HKS' original "HIPER ESTER" can follow extreme boundary lubrication to any kind of engines on the metal absorbed molecular level. Each engine oil viscosity was determined specifically for the target engine for optimum engine performance. Super Oil is 100% specially blended synthetic oil.

The target engine for HKS Super Oil HR series is the most-advanced NA engines. Friction reduction can be experienced under various driving stages from daily driving to circuit driving. Oil viscosity resistance is reduced while maintaining the oil film to run the engine without any stress.

Applications
-4W31 is recommended for Toyota's GR engines and Nissan's VQ NA engines.
0W42 is for Honda's sports VTEC engine such as F20C, F22C, and B18C and HKS GT Supercharger installed vehicles.

Performance
HKS Super Oil HR series is a replacement of "Premium Pro OIL" and "RACING Pro OIL." -4W31 is equivalent to API standard 0W30. Low viscosity at the regular use range from 40℃ to 100℃ can improve the engine response. Also, the engine condition at the high load range is highly maintained. 0W42 is multi-grade type. This type is recommended not only for NA engines but also GT Supercharger installed vehicles.

For over 40 years, HKS products have been put to the test in drag racing, road racing, rallying, and top speed trials. HKS equipped vehicles have captured numerous racing championships and hold claim to a myriad of competition records using many “off the shelf”, race proven HKS components. As a result, HKS has been synonymous with “performance” in the automotive aftermarket industry for the past 40+ years.