Changing your vehicle's engine oil is a vital maintenance task that ensures engine longevity and safe operation. To perform an oil change properly, begin by parking your car on a level surface, applying the parking brake, and allowing the engine to run for five minutes to warm the oil. Next, safely jack up the car and locate the oil drain plug beneath the engine. Remove the plug and drain the old oil into a catch container, then replace the plug and remove the old oil filter. Lubricate the new filter, install it by hand, and refill the engine with fresh oil using a funnel. Finally, run the engine briefly to check for leaks, and dispose of the old oil responsibly. Remember to consult your owner's manual for oil specifications and consider seeking assistance from professionals if needed.