* Consult your owner's manual: This is the best resource for the precise location and instructions for changing the oil filter.
* Look at a diagram: Online resources like repair manuals (often available for purchase or as free PDFs) or even YouTube videos showing oil changes on a '93 Buick Century will show a visual.
Remember to always let the engine cool down before attempting an oil change. Be careful when handling hot oil and always properly dispose of used oil.