Frequent oil changes are the best preventive maintenance the home mechanic can give the engine, as aging oil becomes diluted and contaminated, leading to premature engine wear. Before beginning the procedure, ensure you have all the necessary tools and plenty of rags or newspapers for spills. Access to the underside of the vehicle is improved with a hoist, ramps, or jackstands, but avoid working under a vehicle supported only by a bumper or jack. Familiarize yourself with the oil drain plug and filter locations before starting. Park the vehicle on a level spot, start the engine to reach normal operating temperature, then turn it off and remove the filler cap. Raise and secure the vehicle on jackstands, being cautious of hot exhaust components. Place a drain pan under the drain plug and remove it, allowing the old oil to drain completely. Inspect the old oil for metal shavings and chips. Wipe off the drain plug and clean the area around the opening before reinstalling and tightening the plug. Move the drain pan under the oil filter and use an oil filter wrench to loosen and remove it. Wipe off the mounting surface on the block and ensure no old gasket remains. Compare the old filter with the new one and apply clean engine oil to the rubber gasket of the new filter. Attach the new filter following the tightening directions. Remove all tools and lower the vehicle. Add new oil through the filler cap, pour four quarts, wait for it to drain into the pan, then check the level on the dipstick. Start the engine and check for leaks at the drain plug and filter. Wait for the oil to trickle down, recheck the level, and add more if necessary. After an oil change, check for leaks and proper oil level during the first few trips. Dispose of the old oil properly. Reset the oil change indicator by turning the ignition key to the On position, depressing the accelerator pedal three times within 10 seconds, then turning the ignition key to the Off or Lock position and starting the vehicle.
