Previously, we’ve discussed that viscosity is the thickness, or rate of fluidity, of engine oil. And, in general, high viscosity provides more protection of engine components, but greater fluid resistance, resulting in slower engine start-ups, decreased performance, and increased fuel consumption.
We’ve also talked about how to read viscosity ratings.
Now, we’ll explore Viscosity Index and components in engine oil that contribute to viscosity.
Also known as “VI,” the Viscosity Index scale was set up by the Society of Automotive Engineers (SAE) to measure performance over a range of temperatures. Higher VIs provide more stability and consistency throughout all temperatures of operation, resulting in better performance, protection, and fuel economy.
Low viscosity provides less fluid resistance, which can place engines at risk if not properly formulated with performance-enhanced additives. Viscosity Modifiers (VMs) can increase the VI; however, too many VMs may increase risk of damage.
The challenge is finding an ideal balance of base oil viscosity and performance additives.
Throughout ENEOS’ history, we have been working with Japanese automotive industry and API/ILSAC* to formulate new standards and safely lower viscosity of engine oils to increase fuel efficiency while decreasing environmental impact.
ENEOS products are the result of this research, providing the best mix of quality base oil and additives based on our expertise in OE co-development and formulation.
The ideal balance of quality ingredients provides the high VI of ENEOS products, ensuring your vehicle will operate optimally, with high performance, protection, and efficiency at a wide range of temperatures.