The warm weather is finally here, and you’re ready to tackle that overgrown lawn. But before you fire up your trusty lawnmower, there’s one crucial question you need to ask yourself: What gas goes in my lawnmower? It might seem like a simple question, but the answer isn’t always straightforward. This article will delve into the world of lawnmower fuel, exploring the different types of gasoline available, the importance of choosing the right fuel, and how to properly store and use it to keep your mower running smoothly. We’ll also discuss the benefits and drawbacks of using ethanol-free gasoline and provide tips for extending the life of your mower.
In short, while regular gasoline is suitable for most lawnmowers, it’s important to understand the specific requirements of your machine and the potential impacts of different fuel blends on its performance and longevity.
The Basics of Lawn Mower Fuel
Most modern lawnmowers are designed to run on regular unleaded gasoline, the same type you put in your car. However, the key here is “unleaded.” Lead is highly detrimental to the internal components of a lawnmower engine, so it’s essential to use unleaded gasoline exclusively.
What’s the Difference Between Unleaded Gasolines?
While regular unleaded is the most common choice, there are variations that can affect your lawnmower’s performance and longevity.
Ethanol:
One of the main differences between gasolines is the ethanol content. Ethanol is a biofuel derived from plants like corn, and it’s often added to gasoline to reduce emissions and promote the use of renewable energy. However, ethanol can cause problems in lawnmower engines:
- Ethanol attracts moisture: Ethanol absorbs water from the air, which can lead to corrosion and clogging in your mower’s fuel system.
- Ethanol can degrade fuel lines and other components: Ethanol can break down certain types of rubber and plastic commonly used in fuel systems, leading to leaks and malfunctions.
- Ethanol can reduce engine power: Ethanol burns differently than gasoline, and it can lead to a decrease in engine power and efficiency.
Octane Rating:
Another important factor is the octane rating. Octane rating measures a gasoline’s resistance to knocking or pinging in an engine. While higher octane gasoline is often recommended for cars with high-performance engines, it’s generally not necessary for most lawnmowers. A standard octane rating of 87 is usually sufficient.
The Case for Ethanol-Free Gasoline
Given the potential problems with ethanol, many lawnmower manufacturers and experts recommend using ethanol-free gasoline. While it’s typically more expensive than regular gasoline, ethanol-free gasoline offers several advantages:
- Reduced corrosion: Ethanol-free gasoline doesn’t attract moisture, reducing the risk of corrosion in your mower’s fuel system.
- Longer fuel storage life: Ethanol-free gasoline can be stored for longer periods without degrading, ensuring your mower starts reliably when you need it.
- Improved engine performance: Ethanol-free gasoline provides cleaner burning and can improve fuel efficiency and engine performance.
Tips for Using and Storing Lawn Mower Fuel
Even if you choose the best type of gasoline for your lawnmower, proper handling and storage are crucial for maintaining its performance and longevity.
1. Use Fresh Fuel
Avoid using gasoline that’s more than 30 days old, especially if it contains ethanol. Older fuel can become stale and gummy, leading to engine problems.
2. Store Fuel Properly
If you have leftover fuel, store it in a sealed, airtight container in a cool, dry place. Avoid storing it in direct sunlight or extreme temperatures.
3. Clean Your Fuel System Regularly
Regularly cleaning your fuel system can help prevent fuel-related problems. Consider adding a fuel stabilizer to your gas tank to prevent gum and varnish build-up.
When in Doubt, Consult Your Owner’s Manual
Ultimately, the best fuel for your lawnmower is the one recommended by the manufacturer. Consult your owner’s manual for specific fuel recommendations. It may specify the required octane rating, ethanol content limits, and any other relevant fuel-related information.
Conclusion
Choosing the right gas for your lawnmower is an important step in keeping it running smoothly and efficiently. While regular unleaded gasoline is suitable for most models, consider using ethanol-free gasoline for better performance and longevity. Always refer to your owner’s manual for specific recommendations and follow proper fuel storage and handling practices to ensure your lawnmower stays in top condition for years to come.
FAQ
1. What kind of gasoline should I use in my lawn mower?
The type of gasoline you use in your lawn mower is crucial for its performance and longevity. Most modern lawn mowers are designed to run on unleaded gasoline with an octane rating of 87 or higher. This is the standard type of gasoline you find at most gas stations. However, using a higher octane fuel, such as 89 or 91, won’t hurt your mower and might even improve its performance slightly. Avoid using premium gasoline (93 octane or higher) as it’s not necessary and can be wasteful.
2. Can I use E10 gas in my lawn mower?
E10 gasoline, which contains up to 10% ethanol, is commonly available at gas stations. While it’s generally safe for most lawn mowers, it’s important to check your owner’s manual. Some older mowers might have issues with ethanol, which can attract moisture and cause corrosion in the fuel system. If your manual specifically advises against E10, stick to regular unleaded gasoline without ethanol.
3. Should I add gasoline stabilizers to my lawn mower fuel?
Adding a gasoline stabilizer to your lawn mower fuel is highly recommended, especially if you won’t be using the mower frequently. Stabilizers help prevent fuel from degrading and causing problems like carburetor clogging. If you plan to store your mower for an extended period, using a stabilizer is essential to ensure it starts easily when you need it.
4. How long can gasoline stay in a lawn mower?
Gasoline can start to degrade after just a few weeks, especially in warm temperatures. If you’re planning to use your mower frequently, it’s best to use fresh gasoline. However, if you’re storing the mower for several months, it’s advisable to drain the fuel tank and carburetor to prevent fuel deterioration and potential problems.
5. What is the difference between regular gasoline and premium gasoline?
Regular gasoline and premium gasoline differ primarily in their octane rating. Octane rating measures the fuel’s resistance to knocking or pinging during combustion. Premium gasoline has a higher octane rating, which can be beneficial in high-performance engines that operate at high compression ratios. However, for most lawn mowers, regular gasoline with an octane rating of 87 or higher is sufficient.
6. Can I use diesel fuel in a lawn mower?
No, you should never use diesel fuel in a lawn mower. Diesel engines are designed to burn diesel fuel, which has different properties than gasoline. Using diesel fuel in a gasoline engine can severely damage the engine. If you have a diesel lawn mower, make sure you are only using diesel fuel.
7. What should I do if I accidentally put the wrong fuel in my lawn mower?
If you accidentally put the wrong type of fuel in your lawn mower, it’s important to act quickly. Don’t start the engine. Immediately contact a qualified mechanic to have the fuel drained and the engine inspected for any potential damage. It’s better to be safe than sorry, as using the wrong fuel can lead to costly repairs or even engine failure.