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.
By the 1990's the other major oil companies added their synthetic oils to the marketplace, in addition to their petroleum-based products. Before we discuss whether you should use synthetic motor oil in your car and the pros and cons of the product, lets first take a look at how motor oil is made. Here is what Mobil Oil says about the subject on their website (https://www.mobiloil.com/USA-English/MotorOil/Synthetics/Mobil_1_Circle_of_Performance.aspx):