Skip to content

Can You Use Car Oil in a Lawn Mower?

Car Oil on Lawn Mower Guide


Many homeowners often ask whether they can use car
oil for lawn mowers. This makes perfect sense because part of maintaining this machine is using the right oil. Pouring the wrong type into its engine can impact its performance and lifespan.

Experts' answer is this oil type is not for lawn mowers because:

  • Excessive Wear and Tear: Car oils may not give enough lubrication for lawn mower engines. Car oils are thicker than the ideal for lawn mower engines. The more viscid the oil, the harder it is to circulate inside the engine, causing it to overwork.
  • Engine Damage: Many car oil brands contain additives not suited for lawn mowers. These substances may cause deposits or sludge buildup in small engines. This can lead to engine damage. 
  • Reduced Machine Efficiency: The engines of these backyard maintenance machines are air-cooled. They also run at higher RPMs than car engines. Using the wrong type of oil can affect the performance of your lawn mower, making it less efficient and more prone to breakdowns.

Types of Lawn Mower Engines

For your lawn mower to run without a hitch, choosing the right type of oil for your mower’s engine type is crucial. Lawn mowers engines fall under two types:

  • 2-stroke engines need a mixture of oil and gasoline. The oil lubricates the engine parts. As such, it's critical to use the correct oil type to prevent engine damage.
  • 4-stroke engines require oil similar to car engines, but you still need to check if the specific formulations do not damage your mower.

Types of Oil You Can Use for Your Lawn Mower

The next question is, what oil types work best for your lawn mower. There are three main types for lawn mowers. The best type to use depends on the right engine type, climate of the lawn and how you use your mower.

  • Conventional Oil (SAE 30): As the most common type of lawn mower oil, it is best suited for warmer climates (temperatures above 40°F). It's a good budget-friendly option but has many limitations. For heavy machine use, this type does not offer the same level of protection as synthetic oils.
  • Synthetic Blend Oil (SAE 10W-30): This contains a mixture of conventional oil and synthetic oil. It offers a good balance between performance and price. It's a good choice if you live in an area where there are moderate temperature variations.
  • Full Synthetic Oil (SAE 5W-30): This provides the best performance and protection from extreme temperatures. It is also recommended for heavy use, The only downside is its price.

    Lawn Mower Engine Maintenance Tips

Tips for Maintaining Your Lawn Mower Engine

Keeping your lawn mower running efficiently requires routine maintenance apt for the specific engine type. Using the right oil is just one of the many mower maintenance tasks. Here are the others:

  • Change Oil Regularly: You can find the recommended change oil intervals in the owner’s manual. Usually, you need to do this activity after every 25-50 hours of use or at the start of each mowing season.
  • Always Check the Oil Level: Do this task before using your mower. Operating at low oil levels can result in severe engine damage.
  • Use Fresh Oil: Old or used oil reduces lubrication and engine performance of your mower.
  • Clean the Air Filter: A clean air filter protects the engine damages caused by dirt and debris.
  • Inspect for Leaks: Oil leaks often indicate bigger problems, prompting you for a regular check.

Using the correct oil in your lawn mower is essential for its longevity and performance. While using car oil can be tempting, manufacturers and experts generally do not recommend this practice. Always refer to the manual and use oil specifically designed for small engines to ensure that your mower will not get damaged.

Visit Southern Supply Group to learn more lawn care tips and advice. You can also contact us to guide you in every step of your backyard maintenance.

Next article The Purple Paint Law in Alabama: A New Way to Mark Private Property

Compare products

{"one"=>"Select 2 or 3 items to compare", "other"=>"{{ count }} of 3 items selected"}

Select first item to compare

Select second item to compare

Select third item to compare

Compare