Lawn Mower Engine Oil Guide: What Oils to use & How Often?

Landscaping EducationMary Clementi
Don't miss out on expert tips for selecting the right oil and filters for your lawn mower. See why every lawn enthusiast trusts these products! 🛠️ #MowerMaintenance
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Check out this In-depth discussion about the best Engine Oil & Filter options for your lawn mower.

Tune-in for a quick answer within the first 2 minutes of the video, or hand around for the whole video for a more detailed breakdown of Engine Oil types, Oil change intervals, filter options, and much more.

Choosing the Right Oil and Filter for Your Lawnmower: A Comprehensive Guide

Welcome back! If you've ever found yourself puzzled over which oil to use in your lawnmower, particularly if you live in a warmer climate like the Southeast United States, this guide is crafted for you. Today, we're diving deep into the world of lawnmower maintenance, focusing on optimal oil and filter selections based on your machine’s engine type and your regional climate conditions.

Understanding Oil Types and Filters for Different Engines

Kawasaki Engines

For those with Kawasaki engines in their mowers, the preferred oil type is 20W50. This recommendation comes after observing issues with valves in older models, which prompted the shift from lighter oils to this thicker alternative to prevent similar problems. This oil ensures better performance and longevity, especially after adjustments made by Kawasaki to their engine designs.

When it comes to oil filters, Kawasaki owners have two main options which should primarily be chosen based on the physical space around the engine. The filters vary in size (one is longer and skinnier, while the other is shorter and wider), but both are effective in sealing and preventing leaks, ensuring your engine remains in top shape.

Kohler Engines

Kohler engine owners should lean towards SAE 30 oil, also known as the "yellow cap" oil, especially during the hot months prevalent in southern states. This oil type is ideal for air-cooled engines found in many Kohler models. In slightly cooler conditions, such as those in Northern Florida or neighboring states like Georgia and the Carolinas, 10W30 is also a suitable alternative.

Filter-wise, Kohler recently transitioned to mainly using black filters due to supply constraints with yellow filters. However, both filter types are compatible with Kohler engines and provide the necessary protection and oil cleanliness.

Toro Engines

For those with Toro lawnmowers, which are equipped with Toro engines, the oil recommendations align closely with those given for Kohler engines. The ideal choices are either SAE 30 or 10W30. It’s crucial to use Toro's OEM filter (part number 136-7848) to avoid issues like leaks that often accompany aftermarket filters.

Special Considerations for Different Models and Conditions

  1. High Capacity Engines:

    • For larger engines, such as the Kohler 980 CC Big Blocks, a thicker oil, 20W50, is necessary. These engines have a higher oil capacity, usually around three quarts, to accommodate their larger size and workload.

  2. Environmental Factors:

    • In extremely hot temperatures, thicker oils like 20W50 can provide better lubrication and heat management.

  3. Aftermarket Filters:

    • While they may be tempting due to potentially lower costs, aftermarket filters often fail to perform as well as OEM options. Leakage and poor fit are common issues, which could lead to bigger engine problems down the line.

Maintaining Your Lawnmower: Oil Change Tips and Best Practices

Changing the oil in your lawnmower is a critical maintenance task that should not be overlooked. It’s recommended to change your oil every 50 hours of operation, or more frequently if operating under extreme conditions. This helps prevent engine wear and maintains optimal performance. Always ensure you're checking and topping off oil levels regularly to avoid running low, which can dramatically affect engine health.

Step-by-Step Guide to Changing Your Oil:

  1. Check the oil type and amount required by your specific engine model.
  2. Drain the old oil completely before adding new oil.
  3. Always replace the oil filter with every oil change to ensure cleanliness and efficiency.
  4. Use a funnel to avoid spills when adding new oil, and check the level with the dipstick to ensure you have added enough.

By following these guidelines, you can extend the life of your lawnmower and maintain its efficiency for many seasons to come.

Conclusion

Choosing the right oil and filter for your lawnmower doesn't have to be a complex decision. By understanding the specific needs of your engine type and considering the climate in which you operate your equipment, you can make informed choices that enhance performance and increase longevity. Remember, regular maintenance, including timely oil changes and using the correct oil and filters, is the key to ensuring your lawnmower runs effectively for years to come. Whether you’re tending your personal garden or managing a landscaping business, keeping your equipment in top condition is essential for success.

 

For Kawasaki Engines


For Kohler Engines


For TORO Engines

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Tags: Landscaping education, Mower repair

1 comment

Scott K.

Scott K.

Thanks for the video. I actually watched it twice. Would you still recommend 20W-50 in Northwest Georgia, near Chattanooga? Average summer highs are upper 80s, with plenty of days in the 90s. Also, besides a greater frequency on oil changes, any other regular maintenance intervals that you would shorten? I’ve got a Toro 75750.

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