How to Change Oil on Lawn Mower: Complete Step-by-Step Guide

Proper oil maintenance is essential for keeping your lawn mower in top condition. Changing the oil regularly prevents engine wear, reduces noise, and ensures reliable starting—especially after heavy use. This guide walks you through every step to safely and effectively change the oil like a pro.

Why Changing Oil Matters

Engine oil lubricates moving parts, absorbs heat, and removes contaminants. Over time, oil breaks down and collects grit, losing its protective properties. Neglecting oil changes leads to faster engine degradation, costly repairs, and increased emissions. For gas mowers, changing oil every 25–50 hours of use or at least once per season is recommended.

Gather Your Tools and Materials

Before starting, collect the following:

• Fresh oil (use manufacturer-recommended type: typically 0W-20 or 10W-30 for small engines, check your manual)
  
• Fresh oil filter (compatible with your mower model)
  
• Wrench or socket set for oil drain plug
  
• Oil catch pan (large enough to hold all drained oil)
  
• Funnel with a long spout
  
• Rags or paper towels
  
• Gloves and safety glasses (for protection)

Step-by-Step Oil Change Procedure

Start by warming the engine slightly—run it for 5–10 minutes to thin the oil for easier draining. Then:

1. Locate the oil drain plug under the engine. Place the catch pan beneath it.
   
2. Use a wrench to loosen the plug, but avoid over-tightening. Let the old oil drain fully—this may take 5–10 minutes.
   
3. While the oil drains, remove the old oil filter using a filter wrench. Apply a little new oil to the rubber gasket of the new filter to seal it securely.
   
4. Once drained, replace the drain plug tightly with a clean wrench.
   
5. Install the new oil filter, tightening it by hand until snug—do not overtighten.
   
6. Add fresh oil through the fill port using a funnel. Pour the recommended amount (usually 0.75–1 quart) and wait a minute, then check the level with the dipstick. Top off if needed.
   
7. Start the mower and let it run for 30 seconds to circulate the new oil. Turn it off and recheck the level. Add more if necessary.

Best Practices for Maintenance

• Always use fresh, high-quality oil—old or contaminated oil causes engine damage.
  
• Dispose of used oil responsibly: take it to a recycling center or auto parts store for safe disposal.
  
• Clean spills immediately to avoid slips and environmental harm.
  
• Schedule oil changes seasonally or after heavy use to maintain peak performance.
  
• Inspect hoses, connections, and the air filter regularly as part of your mower’s upkeep.

Final Thoughts

Changing oil on your lawn mower is a simple yet critical task that keeps your equipment running efficiently and extends its life. With just a few tools and ten minutes of attention, you protect your investment and ensure every mowing session is smooth and effective. Make this routine part of your seasonal mower care—your engine will thank you.

Start today: gather your supplies, follow these steps, and enjoy a quieter, healthier lawn mower.