Describe the proper procedure for changing engine oil, including all safety steps and specifications.
Solution:
Preparation Steps:
1. Warm up engine for 2-3 minutes to thin oil for better flow
2. Turn off engine and engage parking brake
3. Gather supplies: new oil, oil filter, drain pan, funnel, socket wrench
Safety Setup:
1. Position vehicle on level surface
2. Use jack stands if accessing from underneath
3. Wear safety glasses and gloves
Drain Old Oil:
1. Locate oil drain plug underneath vehicle
2. Position drain pan beneath plug
3. Remove drain plug and allow oil to drain completely (10-15 minutes)
4. Clean and reinstall drain plug with new washer if needed
Replace Oil Filter:
1. Locate oil filter (usually cylindrical near oil pan)
2. Use oil filter wrench to remove old filter
3. Apply thin coat of new oil to new filter's rubber gasket
4. Hand-tighten new filter until gasket contacts mounting surface, then turn 3/4 additional turn
Add New Oil:
1. Locate oil filler cap on top of engine
2. Use funnel to add specified amount of correct viscosity oil
3. Replace oil filler cap
Final Steps:
1. Start engine and check for leaks
2. Run for 2-3 minutes, then shut off
3. Wait 5 minutes for oil to settle
4. Check oil level with dipstick and add if needed
5. Dispose of old oil and filter at recycling center
Specifications:
• Use manufacturer-recommended oil viscosity and API rating
• Follow drain plug torque specifications to prevent leaks
• Never overfill oil reservoir