By David Hodson • Difficulty: Moderate
The following procedure is correct for all Duratec engines in the Ford Focus, including the 2.3L engine in 2004-2007 models. As stated on the oil filler cap, use 5W-20 oil when adding or changing oil. There are a number of different oil filters by different manufacturers that will work for the Focus, so you may want to consult the parts counter at your local auto parts store.
Convention has always been to change oil at 3,000 mile intervals, but modern oil and oil filters allow for much more time between changes. As long as you check your oil level regularly, you can easily make it 5,000 miles with conventional oil, and over 7,500 miles with synthetic oil.
- Remove the oil filler cap by rotating it 1/4 turn counterclockwise and lifting it off the valve cover.
- Locate the oil pan drain plug underneath the car. It is a 13 mm hex bolt that faces towards the rear of the car.
- Place an oil drain pan underneath the oil pan to catch the draining oil. Remember to place it towards the rear of the car, since the oil will come out of the oil pan in a stream.
- Loosen the oil pan drain plug with a 13 mm socket wrench until it comes off and oil is draining out of the oil pan.
- Place a funnel in the oil fill hole in the valve cover.
- Pour a quart of oil into the funnel and let all of it drain and collect in the oil drain pan.
- Wipe off and replace the oil pan drain plug. Use a moderate amount of force, but do not over-tighten the bolt.
- Position the oil drain pan underneath the oil filter.
- Turn the oil filter counterclockwise (when looking up at it) to remove it.
- Set the old filter in your oil drain pan with the gasket facing down to allow the oil to drain out of it.
- Let the rest of the oil from the engine drain and collect in the oil drain pan.
- Apply a small amount of clean oil to the rubber gasket on the new oil filter.
- Wipe off the oil filter mounting spot and install the new filter by rotating it clockwise until you cannot tighten it anymore.
- Pour five quarts of 5W-20 oil into a funnel in the oil fill hole.
- Reinstall the oil filler cap by turning it 1/4 turn clockwise.
- Start your car and let it run. Check for leaking oil underneath the car. If you notice any leaks, tighten the drain plug, being careful not to over-tighten it and crack the oil pan.
- Close the hood and lower the car back to the ground: you're done!
- Allow 12-24 hours for all of the oil to drain out of the old oil filter.
- Take your old oil and filter to a recycling facility. Most auto parts stores and repair shops accept these at no charge to you. In addition, some cities and/or counties have a service where they will collect used oil and filters from your home. For more information, see the American Petroleum Institute's web page on used motor oil collection and recycling.