Drain the old oil
Again, watch out for hot oil! It's not a bad idea to wear safety glasses or even prescription glasses.
- Take your wrench and shallow pan and crawl under the car. Find the oil plug under the engine block that unscrews on the underside of the oil pan.
- Place the shallow pan under the plug and unscrew the plug (counter-clockwise) with the wrench. (If the wrench slips and starts to round off the bolt head, try a socket wrench instead.)
- The oil will stream out rapidly, so be careful. Chances are, the plug will fall into the pan along with the oil. Don't worry when it happens.
When all the oil has drained into the pan, fish out the plug (here's where rubber gloves come in handy) and screw it back in. Tighten it firmly, but not so hard that you strip the threads.