How to Change the Oil on a 1999 Ford Expedition

by Maelin McCartneyUpdated November 07, 2017

Items you will need

  • Drain pan

  • Socket wrench

  • Filter wrench

  • Jackstands

  • Jack

  • Rags

  • Funnel

  • Putty knife

Ford Motor Company recommends changing the oil in your 1999 Ford Expedition every 5,000 miles or every six months, whichever comes first. Over time, engine oil breaks down and becomes contaminated, which can damage the engine. Changing your oil regularly may reduce the wear on the engine and keep your Expedition running longer.

Flip the switch for the air ride suspension, located on the passenger side kick plate, to the “Off” position, if your Expedition is equipped with air ride suspension.

Park on a level surface, and engage the parking brake. Start the engine, and let it run for approximately 10 minutes. Shut the engine off. Open the hood, and remove the oil filler cap from the valve cover.

Jack up the 1999 Ford Expedition, and place jackstands under the notches on the vehicle frame near both front tires. Lower the vehicle by releasing the jack slowly, until the Expedition rests securely on the jackstands.

Place the drain pan below the oil pan drain plug on the underside of the vehicle. Remove the drain plug, using the proper size socket wrench. Wipe the drain plug with a clean rag after the oil has drained fully into the drain pan. Check for, and wipe away, any small metal particles on the drain plug, as these can contaminate new oil. Wipe the area around the drain plug hole in the oil pan, the reinstall the drain plug. Tighten securely, but avoid stripping the threads.

Move the drain pan so it is beneath the oil filter, located under the vehicle, near the driver’s side headlight. Loosen the oil filter with a filter wrench, turning counterclockwise. Place the filter wrench around the oil filter. Turn counterclockwise until it is loose, and then twist by hand until the filter releases. Once released, immediately tip the open end up, stopping any oil inside the filter from spilling.

Wipe off the oil filter mounting surface on the engine block with a clean rag, and scrape off any pieces of the old gasket (rubber ring on the oil filter) that may be stuck on the engine block with a putty knife.

Compare the new filter to the old filter to ensure they are the same type. Wipe a small amount of oil on the gasket of the oil filter, then screw into place, turning it clockwise by hand. Do not over-tighten; once the oil filter gasket meets the engine block, rotate only ¾ of a turn more, unless the manufacturer instructions state differently.

Remove all materials and tools from beneath the Expedition, then jack it up slightly to remove the jackstands. Lower the vehicle to the ground.

Pour four quarts of fresh SAE 5W-30 oil into a clean funnel placed into the oil filler valve. Wait three minutes, then remove the dipstick, and check the oil level, which should be in the hatched area on the dipstick. If not, add oil in small increments, and repeat procedure, wiping the dipstick between readings, until the oil level reads in the hatched area.

Replace the oil filler valve cap. Start the engine, and let it run for one minute. Inspect under the vehicle for leaks from the oil filter or drain plug while the engine is running. If you find leaks, stop the engine, and tighten the leaking part. Recheck the dipstick level after five minutes. If the level falls below the hatched area on the dipstick, add oil, as necessary.

Turn the air suspension switch back to the “On” position, if equipped.

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