There are many advantages to changing it yourself, but you can take more advantage by pulling the drain plug and draining it out the bottom.

If you will change it after driving in on Friday night and immediately change clothes and pull the plug, you can then let it drain overnight. By pulling the plug while hot you are draining the oil while all the gunk is churned up in the oil. By draining it overnight, you get every last drop of oil out and the last drops are the gunkiest of what you get out.

There will be those who will argue that sucking the oil through the dipstick tube will get more out, but don't believe it. Additionally draining it out the bottom gives you a chance to regularly look around underneath for leaks, loose bolts or for anything else that might be awry.

I have changed my own oil all my life. I just won't trust my car to a stranger. I won't even let anyone else pump fuel into my car. If I WERE to decide to let someone else change my oil, Wal Mart would certainly be at the bottom of my list.

Good luck,