I used to often change the oil in my Dodge vehicles. If a person is not afraid to get under a car and get their hands or clothes a little dirty, you don't need training in rocket science to perform this task. The first thing I would do is park the car on a level area, put on the parking brake, and block the back of one of the rear tires with a stone or block of wood. Next, I would jack up the front bumper high enough so I can slide on my back and get far enough under to collect the old engine oil. If you don't want to get your clothes dirty, I would suggest disassembling some cardboard boxes so that you can lie on them. If you had a skid on wheels to lay on, this would be ideal. Now that you are ready to begin, first step is to locate the oil pan and remove the nut on it with boxend wrench or crescent wrench of the correct size. Put a pan under the oil pan, so that the oil from the engine's oil pan will flow into the pan. Make sure the pan is big enough to hold 4-5 quarts of the used dirty engine oil and the oil filter. After you have released the dirty oil into a pan, the next step is to remove the oil filter. In newer model cars, you should be able to get at the oil filter by standing up and going under the engine hood. In some older model cars, you will have to remove the filter by going under the car. Since you probably will not be able to loosen the filter by hand, it is necessary to have a flexible filter wrench for this chore. After putting the filter wrench around the filter, tighten it up and then turn counter-clockwise to loosen and remove the filter. After you have removed the filter and all of the oil from the engine block has drained out, you are ready to put on a new filter and add clean oil. Before buying an oil filter, make sure you know the make and year of your vehicle. You can find this information from manuals in auto parts stores or ask a clerk to find the correct filter for you. There are different grades of motor oil to use, so look at your car's owner manual to find out the correct grade. The car's manual will also tell you if you need to put 4 or 5 quarts of oil in. Before you put the new oil in, tighten the nut on the oil pan so the new oil will stay in the engine block. Next, put the new filter on the car. Coat the gasket of the filter with oil before screwing it on by hand. Turn in a clockwise direction until tight. Next, pour the new oil into the engine. Start up the car now and check for oil leaks.