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 population of the Midland metropolitan area, composed of Midland County, grew 4.6 percent to 151,662 between July 1, 2011, and July 1, 2012, according to the U.S. Census Bureau. It is the principal city of the Midland, Texas Metropolitan Statistical Area, which includes all of Midland County. The metropolitan area is also a component of the larger Midlandâ Odessa, Texas Combined Statistical Area, which had an estimated population of 295,987 on July 1, 2012.