High Quality, Low Viscosity Oil Provides Benefits in All Climates - aftermarketNews

High Quality, Low Viscosity Oil Provides Benefits in All Climates

Zero weight oils have benefits in cold weather, but what are the benefits when used in hotter environments?

Sponsored by ENEOS

One of the questions we regularly get, both from the general public and service technicians, is regarding the use of zero weight (0W) oils in warm climates. In Hawaii, our sales team has repeatedly heard that 0W oil has no purpose for vehicles that operate in a warm climate. Hawaii enjoys beautiful, warm weather, typically in the 80s as we all know and envy. But does warmer weather impact low viscosity oil, and if so, how?

Weight ratings, revisited

In a viscosity rating, the ‘W’ stands for ‘winter,’ as in cold weather. This rating refers to external temperature, as the term ‘winter’ indicates, and initially when it was introduced, the winter weight related to operation in colder temperatures, helping ensure the immediate operating viscosity was fluid enough and didn’t need to be warmed up to flow freely and effectively lubricate the engine. Engines using 0W oils operating in colder climates definitely benefit by enjoying faster starts and better performance in colder weather.

0W-20, for example, is rated at 104°F (40°C) for external temperatures, and 212°F (100°C) for internal engine temperatures. So, the 0W rating of most oils, including ENEOS, is within operational parameters of warmer climates like Hawaii, Phoenix, and Las Vegas. Even cars in sunny spots benefit from 0W oils, which have a higher Viscosity Index (VI), providing more stability and consistency throughout all temperatures of operation, resulting in better performance, protection, and fuel economy.

Zero weight oil and hybrids

One important reason 0W oils were created was for hybrid engines. A hybrid engine operates through a constant cycle of starts and stops, depending on driving conditions, which leads to constant heating and then cooling of the engine. During these cycles, if the oil had to reach operating temperature to be at full fuel efficiency, only to cool back down when the engine cycles off, the optimum fuel-efficient viscosity could never be maintained and fuel economy would suffer. For this reason, car manufacturers needed an oil that was at optimal operating viscosity right at startup. That’s why many hybrids call for 0W oils in their specifications, although they also provide benefits for many other vehicles.

Oil viscosity is decreasing due to fuel efficiency standards and engine designs but it is also designed to protect better than ever before. Not only have we moved on from 0W-20 to using 0W-16 in this country, in Japan ENEOS is already providing 0W-8 for Japanese automakers.

This article was sponsored by ENEOS. To learn more, please visit www.eneos.com.

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