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.
Another one of the best synthetic motor oils, in addition to the aforementioned Amoil, is the Mobil 1 10W-30 Full Synthetic Motor Oil 6-Quart Case ($34.47 via $12 mail-in rebate and free shipping, a low by $18; expires October 31), which will set you back just $7.75/quart.n the early '70s, AMSOIL brought the first synthetic automotive motor oil to market, and it's still considered to be one of the better oils for diesel motors. As such, a gallon of the Amsoil Synthetic Blend 15W-40 Heavy Duty Motor Oil ($26.40 with $11.84 s&h) is the original synthetic motor oil.