Choosing the Right Oil for Your Push Lawn Mower

by Anna

Maintaining a well-groomed lawn is a point of pride for many homeowners, and a crucial tool in achieving this is a push lawn mower. To keep your push lawn mower running smoothly and efficiently, selecting the right type of oil is paramount. The type of oil you use can significantly impact the mower’s performance, longevity, and overall functionality. In this comprehensive guide, we will delve into the factors that influence the choice of oil for your push lawn mower and provide practical insights to ensure your machine remains in optimal condition.


The Role of Oil in a Push Lawn Mower

Oil plays a critical role in the operation of a push lawn mower’s engine. It serves as a lubricant, preventing friction between moving parts, and helps dissipate heat generated during operation. Proper lubrication is essential for reducing wear and tear on the engine components, which ultimately prolongs the mower’s lifespan and ensures consistent performance.


Understanding Oil Viscosity

Viscosity refers to the oil’s thickness and its ability to flow. It is denoted by a number followed by a “W,” such as 10W-30. The “W” stands for “winter,” and the number preceding it (e.g., 10W) indicates the oil’s viscosity at low temperatures. The second number (e.g., 30) represents the oil’s viscosity at high temperatures.

For most push lawn mowers, an oil with a viscosity of 10W-30 is recommended. This viscosity range strikes a balance between smooth cold-starting during lower temperatures and stable lubrication at high temperatures when the engine is running.

Factors Influencing Oil Choice

Several factors influence the choice of oil for your push lawn mower:

1. Manufacturer’s Recommendations

Always consult the owner’s manual provided by the mower’s manufacturer. This document typically contains valuable information regarding the specific type and viscosity of oil recommended for your mower model. Following the manufacturer’s guidelines ensures optimal performance and prevents potential warranty issues.

2. Climate Conditions

Climate plays a significant role in oil selection. If you reside in an area with cold winters, using a lower viscosity oil (e.g., 5W-30) during colder months can aid in easier engine starting. On the other hand, a higher viscosity oil (e.g., 20W-50) might be more suitable for mowing during hot summer months.

3. Frequency of Use

If you frequently use your push lawn mower, consider using synthetic oil. Synthetic oils offer superior lubrication and are better equipped to withstand the rigors of frequent operation. They also tend to have a longer lifespan compared to conventional oils.

4. Engine Type

Push lawn mowers can feature either two-stroke or four-stroke engines. Two-stroke engines require a mixture of oil and gasoline, while four-stroke engines have a separate oil reservoir. Ensure you understand which type of engine your mower has, as this will determine whether you need oil for fuel mixing or lubrication.

5. Oil Additives

Some oils come with additives designed to enhance certain properties, such as cleaning deposits or improving engine protection. While these additives can be beneficial, it’s essential to ensure they are compatible with your mower’s engine. Consulting the owner’s manual or manufacturer’s recommendations can provide insight into suitable oil additives.

Synthetic vs. Conventional Oils

One significant decision when selecting oil for your push lawn mower is whether to use synthetic or conventional oil. Both options have their advantages and considerations:

Conventional Oil

Conventional oil, also known as mineral oil, is derived from crude oil. It provides reasonable lubrication and works well in standard operating conditions. However, it may break down faster under high temperatures and heavy usage compared to synthetic oils. Regular oil changes are necessary to maintain optimal engine health when using conventional oil.

Synthetic Oil

Synthetic oil is engineered to offer enhanced lubrication and performance. It maintains its viscosity better under extreme temperatures and provides improved protection against wear and deposits. Push lawn mowers operating in challenging conditions, such as high temperatures or frequent use, can benefit from synthetic oil. While synthetic oil is generally more expensive than conventional oil, its longer lifespan and superior performance can offset the higher initial cost.

Steps to Change the Oil

Changing the oil in your push lawn mower is a straightforward process that ensures the engine’s longevity and performance. Here’s a step-by-step guide:

Prepare the Equipment: Make sure the mower is on a level surface and the engine is cool. Have the necessary tools, a drain pan, and the appropriate oil ready.

Drain the Old Oil: Locate the oil drain plug underneath the mower’s engine. Place the drain pan beneath it and remove the plug to allow the old oil to drain completely.

Replace the Oil Filter (If Applicable): Some push mowers have oil filters that should be replaced during an oil change. Follow the manufacturer’s instructions for this step.

Add the New Oil: Consult the owner’s manual for the recommended oil type and capacity. Slowly pour in the new oil through the oil fill tube. Avoid overfilling, as it can lead to engine damage.

Check the Oil Level: After adding the oil, use the dipstick to check the oil level. Add more oil if necessary to bring it to the recommended level.

Dispose of Old Oil Properly: Used oil is considered hazardous waste. Take it to a designated oil recycling center or a local auto parts store that accepts used oil.

Run the Engine: Start the engine and let it run for a few minutes to distribute the new oil throughout the engine. Check for any leaks.

Check the Oil Level Again: Turn off the engine and wait a few minutes for the oil to settle. Check the oil level once more and add oil if needed.


Selecting the right type of oil for your push lawn mower is a crucial aspect of its maintenance routine. Proper oil choice ensures smooth operation, reduces wear and tear, and extends the mower’s lifespan. By considering factors such as manufacturer recommendations, climate conditions, and oil type, you can make an informed decision that keeps your push lawn mower performing optimally year after year. Remember that regular oil changes are essential for maintaining the health of your mower’s engine, regardless of whether you choose conventional or synthetic oil. With the right care and attention, your push lawn mower will continue to provide you with a well-manicured lawn for years to come.


You may also like

Copyright © 2023