The warm weather has finally arrived, and you’re eager to get your lawn looking its best. But before you can start mowing, there’s one crucial question you need to answer: what kind of gas does your lawn mower need? You might think this is a simple question, but it can actually be a bit tricky. Different lawn mowers use different fuel types, and using the wrong gas can damage your engine.
This article will guide you through the world of lawn mower fuel, explaining the different types of gas used, how to identify the right fuel for your mower, and how to store and handle gasoline safely. By the end of this guide, you’ll be equipped with the knowledge to fuel your mower properly and keep it running smoothly all season long.
Short Answer: The most common type of gas used in lawn mowers is regular unleaded gasoline, with an octane rating of 87 or higher. However, some high-performance or older mowers may require higher-octane fuel, such as 89 or 91. Always check your owner’s manual for specific fuel recommendations.
Understanding Gasoline for Lawn Mowers
Let’s dive into the different types of gas you might encounter and why they matter for your lawn mower.
Regular Unleaded Gasoline: The Most Common Choice
For most modern lawn mowers, regular unleaded gasoline is the standard fuel. This type of gasoline has an octane rating of 87 or higher and is readily available at most gas stations. It’s the most cost-effective option and generally performs well in most lawn mower engines.
Why is Octane Rating Important?
Octane rating is a measure of a fuel’s resistance to knocking or detonation. Knocking occurs when the fuel ignites prematurely in the engine’s cylinder, causing a loud knocking sound and potential engine damage.
- Lower octane fuel: More prone to knocking, especially under high load or high compression.
- Higher octane fuel: More resistant to knocking, offering better performance in high-performance engines.
However, using higher octane fuel than recommended for your mower won’t provide any noticeable performance gains and can actually be wasteful.
Premium Unleaded Gasoline: When To Consider It
Some lawn mowers, especially those with high-performance engines or older models, might require premium unleaded gasoline. This fuel has a higher octane rating of 89 or 91, which is designed to prevent knocking in engines with higher compression ratios.
Signs Your Mower Might Need Premium Unleaded:
- Owner’s manual specifies it: The most reliable way to determine if your mower requires premium fuel is by consulting the owner’s manual.
- Engine knocking or pinging: If you hear a knocking or pinging sound while running your mower, it might be a sign that you need to use a higher octane fuel.
- Mower performance issues: If your mower seems to be losing power or performing poorly, experimenting with premium fuel might be worthwhile, but only if recommended by the manufacturer.
Ethanol Blends: A Point of Concern
Gasoline often contains ethanol, an alcohol-based fuel additive that is intended to improve fuel efficiency and reduce emissions. However, ethanol can cause problems in lawn mower engines, particularly older models.
Ethanol’s Impact on Lawn Mower Engines:
- Corrosion: Ethanol can corrode fuel lines and other engine components, leading to engine problems.
- Phase separation: Over time, ethanol blends can separate into different layers, leading to fuel system blockages.
- Reduced power: Ethanol can reduce the power output of your engine.
If your lawn mower is older or you experience any fuel-related problems, consider using gasoline with a lower ethanol content (10% or less) or even ethanol-free gasoline.
How to Find the Right Fuel for Your Lawn Mower
Now that you understand the different types of gasoline, how do you figure out which one is right for your mower? Here’s a straightforward approach:
1. Check the Owner’s Manual: Your Ultimate Guide
The most important step is to refer to your lawn mower’s owner’s manual. It will clearly state the recommended fuel type, including the octane rating and any specific recommendations regarding ethanol content.
2. Look for Fuel Information on the Mower
Many modern lawn mowers have labels or stickers attached that indicate the recommended fuel type. Check the engine housing, fuel tank, or the side of the mower for any markings.
3. Consult the Manufacturer’s Website
If you can’t find the fuel information in your owner’s manual or on your mower, try searching the manufacturer’s website for your model number. They often have online resources with fuel specifications.
Storing and Handling Gasoline: Safety First
Properly storing and handling gasoline is essential for safety and to prevent problems with your lawn mower.
1. Store Gasoline in Approved Containers
Use only approved gasoline containers made of sturdy plastic or metal. Never store gasoline in glass containers.
2. Choose a Well-Ventilated Area
Store gasoline in a well-ventilated, cool, and dry area away from direct sunlight and heat sources.
3. Keep Gasoline Away from Flammable Materials
Store gasoline away from any flammable materials, such as paper, cloth, or other combustibles.
4. Don’t Fill Fuel Tank While Engine is Running
Never fill the fuel tank while the engine is running, as this creates a serious fire hazard.
5. Don’t Overfill the Tank
Overfilling the tank can lead to fuel spills and leaks. Leave some space at the top of the tank to allow for fuel expansion.
6. Label Gasoline Containers Clearly
Label your gasoline containers clearly so you know what’s inside and to avoid confusion.
Choosing the Right Gasoline: A Recap
To sum up, here’s a quick recap of the key points to remember:
- Always check your owner’s manual: This is the most reliable source for fuel recommendations for your specific lawn mower.
- Regular unleaded gasoline is usually sufficient: For most modern lawn mowers, regular unleaded gasoline with an octane rating of 87 or higher is the best choice.
- Consider premium unleaded if recommended: High-performance mowers or older models might require premium unleaded gasoline.
- Be cautious about ethanol blends: Ethanol can cause problems in some lawn mower engines, particularly older models.
- Store and handle gasoline safely: Follow proper safety procedures when storing and handling gasoline to prevent accidents and engine problems.
By following these tips, you can ensure you’re using the right gas for your lawn mower and keeping it running smoothly all season long. Enjoy your perfectly manicured lawn!
Frequently Asked Questions
What is the most common type of gas used in lawn mowers?
The most common type of gas used in lawn mowers is regular unleaded gasoline, also known as 87 octane. This type of gas is readily available at most gas stations and is generally the most affordable option. It is important to note that using a higher octane fuel, such as premium, will not improve your lawn mower’s performance or efficiency.
Should I use ethanol-blended gasoline in my lawn mower?
It is generally not recommended to use ethanol-blended gasoline in your lawn mower. Ethanol can attract moisture, which can lead to corrosion and other problems in your mower’s engine. If you must use ethanol-blended gasoline, choose a blend with no more than 10% ethanol.
Can I use diesel fuel in my lawn mower?
No, you should not use diesel fuel in your lawn mower. Lawnmowers are designed to run on gasoline, and using diesel fuel can damage the engine. Diesel fuel has a different chemical composition than gasoline, and it is not compatible with the engine components in a lawnmower.
Can I use gasoline with an octane rating lower than 87?
It is generally not recommended to use gasoline with an octane rating lower than 87 in your lawn mower. Using lower-octane gasoline can lead to engine knocking, which can damage your engine. If you are unsure about the octane rating of the gasoline you are using, it is best to consult your lawn mower’s owner’s manual.
How often should I change the gas in my lawn mower?
It is generally recommended to change the gas in your lawn mower every 30 days. This will help to prevent the gas from going bad and causing problems with your mower’s engine. You should also drain the gas tank before storing your lawn mower for the winter.
What are the signs that my lawn mower is using the wrong type of gas?
There are a few signs that your lawn mower may be using the wrong type of gas. These include difficulty starting, poor performance, and engine knocking. If you notice any of these symptoms, it is important to check the gas you are using and make sure it is the correct type for your lawn mower.
What is the best way to store gasoline for a lawn mower?
If you need to store gasoline for a long period of time, it is important to use a fuel stabilizer. Fuel stabilizers help to prevent the gas from going bad and causing problems with your mower’s engine. It is also important to store the gasoline in a cool, dry place, away from direct sunlight and heat.