These additives are used to make the oil. amulti-grade motor oil, though it is possible to have a multi-grade oil without the use of VIIs. The idea is to cause the multi-. grade oil to have the viscosity of the base grade when cold and the viscosity of the second grade when hot.
Midland County is a county located in the U.S. state of Texas. As of the 2010 census, the population was 136,872. The county seat is Midland. The county is so named as the county is halfway (midway) between Fort Worth and El Paso on the Texas and Pacific Railway. Midland County is included in the Midland, TX Metropolitan Statistical Area as well as the Midlandâ Odessa Combined Statistical Area.
The city of Midland had most of the county's population but only elected one of the five county commissioners, which was found to violate the Fourteenth Amendment. Geography According to the U.S. Census Bureau, the county has a total area of 902 square miles (2,340 km 2), of which 900 square miles (2,300 km 2) is land and 1.8 square miles (4.7 km 2) (0.2%) is water.