![]() ![]() ![]() Manufacturers developing engines for heavy goods vehicles are carrying out research, but have yet to deliver any concrete results. HTHS viscosity, which is calculated by a different unit of measure, centipoise (cP), is measured at a higher temperature 150 degrees C (302 F) and a pre-set shear rate. ![]() This brings many challenges with respect to the maintenance of the correct protection and durability – within the correct oil formulas.įor the time being, these innovations are only applicable to hardware for passenger vehicles. There is a very big chance that engine manufacturers will have to redesign their engines: it is only with the right type of engine that users will benefit from this “new” low-viscosity oil.Īs previously described, new additives must be developed to add to this “new” oil. High-temperature, High-shear (HTHS) Oil Viscosity: Measurement and Relationship to Engine Operation What people are saying - Write a review Selected pages. The contribution of VI improver to MOFT was found to be dependent on the SAE grade and VI improver type. Therefore, the development of new additives for these ultra-thin oils for high-performance engines is crucial.Requirement for new designs Although high-shear, high-temperature (HSHT) viscosity was found to be important, the viscosity index (VI) improver type was also a factor in determining MOFT. But it can also result in an increased risk of damage and cause critical engine parts to wear out faster. The instrument mainly determines the apparent viscosity of lubricating oil at high temperature and high shear rate. HTHS-viscosity can result in fuel savings throughout the course of the entire oil change interval. ![]()
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