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.
Ford part number is F81Z-9C968-AB (replaces the F81Z-9C968-AA). Motorcraft part number is CM-5013. This is an OEM replacement part new from Ford Motorcraft. The IPR valve (Injector Pressure Regulator) fits all the Powerstroke 7.3 Turbo Diesel from '95.5 (with an engine serial number higher then 187100) to '03 models.