What Does The W Stand For In 10W-40 Oil - Web the first number in the viscosity rating (e.g., 5w or 10w) represents the oil’s flow characteristics at lower. Web the lower the w number is (“w” stands for winter), the thinner the oil will be. In this case, a 10w rated oil will be thicker in. Two of the most common engine oils on the market are 10w30 and 10w40. W stands for winter “w” stands for “winter.” when oil grades are hyphenated (i.e. Web the “w” stands for ‘winter,’ indicating the oil’s fluidity at colder temperatures. Web the “10w” in both 10w 30 and 10w 40 refers to the oil’s viscosity rating at low temperatures, while the numbers after.
Two of the most common engine oils on the market are 10w30 and 10w40. Web the “10w” in both 10w 30 and 10w 40 refers to the oil’s viscosity rating at low temperatures, while the numbers after. W stands for winter “w” stands for “winter.” when oil grades are hyphenated (i.e. Web the lower the w number is (“w” stands for winter), the thinner the oil will be. Web the first number in the viscosity rating (e.g., 5w or 10w) represents the oil’s flow characteristics at lower. Web the “w” stands for ‘winter,’ indicating the oil’s fluidity at colder temperatures. In this case, a 10w rated oil will be thicker in.