What you'll need:
* New oil: Consult your owner's manual for the correct type and quantity (typically around 5 quarts for a 289, but double-check). Use a quality oil appropriate for your climate and driving conditions.
* New oil filter: Again, check your owner's manual for the correct filter type.
* Oil filter wrench: The correct size will depend on your oil filter. A cap-type wrench or strap wrench is often necessary.
* Wrench for the drain plug: This is usually a 13/16" or 21mm wrench, but double-check your car.
* Drain pan: Large enough to hold at least 5 quarts of oil.
* Funnel: To pour new oil into the engine.
* Jack and jack stands (or ramps): To safely lift the car. Never work under a car supported only by a jack.
* Gloves: To protect your hands.
* Rags or shop towels: To clean up spills.
Steps:
1. Warm up the engine: Run the engine for 5-10 minutes to warm the oil, making it flow more easily. Don't let it get too hot, though.
2. Secure the car: Jack up the front of the car and securely place it on jack stands. Use ramps if you prefer. Ensure the car is stable and won't move.
3. Locate the oil drain plug: It's usually located on the bottom of the oil pan, towards the front of the engine.
4. Position the drain pan: Place the drain pan under the drain plug.
5. Remove the drain plug: Carefully loosen and remove the drain plug using the correct wrench. Let the oil drain completely. This can take 15-20 minutes. Be cautious, the oil will be hot.
6. Locate the oil filter: It's usually located on the side of the engine block.
7. Remove the oil filter: Use the oil filter wrench to loosen and remove the old filter. Some oil will likely spill, so be prepared.
8. Lubricate the new oil filter gasket: Lightly lubricate the rubber gasket on the new oil filter with fresh oil.
9. Install the new oil filter: Screw the new oil filter on by hand until it's snug. Then tighten it according to the instructions on the filter (usually about ¾ to 1 full turn after the gasket contacts the engine).
10. Replace the drain plug: Once the oil has drained, replace the drain plug and tighten it securely, but don't overtighten.
11. Lower the car: Carefully lower the car to the ground.
12. Add new oil: Using the funnel, add the correct amount of new oil as specified in your owner's manual.
13. Check the oil level: Use the dipstick to check the oil level. Add more oil if necessary to reach the "full" mark.
14. Run the engine: Run the engine for a few minutes.
15. Check for leaks: Inspect the area around the drain plug and oil filter for any leaks.
16. Check the oil level again: After running the engine, let it sit for a few minutes and check the oil level again. Top off if necessary.
Important Notes:
* Dispose of used oil properly: Take your used oil to a recycling center or auto parts store that accepts used oil.
* Safety first: Always use jack stands when working under a car. Never rely on a jack alone. Wear safety glasses and gloves.
* Consult your owner's manual: This guide is a general overview. Always consult your 1965 Ford Mustang 289 owner's manual for the most accurate and detailed instructions.
This process is relatively straightforward, but if you're uncomfortable performing this task yourself, it's best to take your car to a qualified mechanic.
