You can claim the Head of Household filing status on your tax return if you pass the support test, the residency test for a qualifying person, and are unmarried at the end of the year. There are also special rules that relate to separated parents and married couples who live apart from each other.
Motor oil. Motorcraft also sells motor oil for automotive use. As of the late 2000s most of their oil is a synthetic blend or fully synthetic. Several weights are available from the 5W-20 all the way to a 15W-40 for diesel engines.
There are also semi-synthetic oils, which are a blend of synthetic oils and conventional mineral oils. Semi-synthetic oils are also sometimes called blends. Both types of engine oil are made from crude oil that comes from the ground.The difference is that synthetic motor oils are made from more advanced refining processes and are of a higher purity and quality than conventional mineral oils or semi-synthetic oils.he performance of synthetic oils, and in particular Mobil 1â¢, is more robust, especially in terms of low temperature pumpability and high temperature stability and protection against deposits. These attributes translate directly into less engine wear, increased fuel economy and longer engine life.