The warm weather has arrived, and you’re ready to tackle your lawn. You pull out your trusty lawn mower, only to discover that the gas in the tank is a bit old. You start to wonder, is it still good? Can you use it, or will it ruin your engine? This article will dive into the lifespan of gasoline, explore the factors that affect its quality, and provide tips on maximizing its storage life for optimal lawnmower performance. Let’s get started!
A Quick Answer
In general, gasoline stored in a lawn mower tank will remain usable for 3-6 months. However, this can vary significantly depending on storage conditions, fuel additives, and the type of gasoline used. Let’s delve into these factors in more detail.
Understanding Gasoline Deterioration
Gasoline is a complex mixture of hydrocarbons, and over time, it undergoes a process called “degradation.” This deterioration is caused by various factors, including:
Oxidation:
Gasoline reacts with oxygen in the air, leading to the formation of gums and varnish, which can clog fuel lines and injectors. This can cause engine problems like difficulty starting, rough idling, and reduced power.
Evaporation:
Light hydrocarbons in gasoline evaporate more quickly than heavier ones, causing the fuel to become less volatile and potentially leading to engine starting issues.
Water Contamination:
Water can condense in fuel tanks, especially if they are not completely sealed, causing rust and corrosion in fuel lines and other components.
Ethanol Content:
Ethanol, a common gasoline additive, can absorb moisture from the air, increasing the risk of water contamination. It also breaks down faster than pure gasoline, shortening its shelf life.
Fuel Stabilizers:
Fuel stabilizers, available at most auto parts stores, are chemical additives designed to slow down the oxidation and evaporation processes, extending the storage life of gasoline.
How To Tell If Gas Is Bad
While it’s impossible to tell the exact age of gasoline just by looking at it, here are some signs that indicate it may be bad:
Appearance:
- Color Change: Fresh gasoline is typically clear or pale yellow. If it’s dark, brown, or has a cloudy appearance, it might be contaminated or oxidized.
- Sediment: If you see sediment or gunk at the bottom of your fuel tank, it’s a clear sign that the fuel has degraded.
Smell:
- Strong Odor: Fresh gasoline has a distinct, sharp odor. If it smells stale, like varnish, or has a sweet, almost candy-like smell, it may have gone bad.
Engine Performance:
- Difficulty Starting: If your lawn mower struggles to start or has trouble running smoothly, it could be a sign of bad gas.
- Rough Idling: If the engine idles roughly or stalls easily, it’s a possible indication of fuel issues.
- Loss of Power: Noticeable reduction in power or performance might signal problems with the fuel.
Tips For Storing Gasoline
Follow these tips to maximize the lifespan of your gasoline:
Choose the Right Fuel:
- Ethanol-Free Gasoline: Opt for ethanol-free gasoline, which is generally available at marinas and some gas stations. It’s less prone to degradation and has a longer shelf life.
- High-Octane Gasoline: Using higher octane gasoline (like 89 or 91) can help prevent knocking and provide slightly better performance.
Store Properly:
- Sealed Containers: Store gasoline in airtight, approved containers designed specifically for fuel. Avoid using plastic containers as they can react with gasoline over time.
- Cool, Dry Place: Store fuel in a cool, dry, and well-ventilated area. Avoid storing it in direct sunlight or extreme temperatures.
Add Fuel Stabilizer:
- Follow Instructions: Add fuel stabilizer to your gasoline according to the manufacturer’s instructions. This will help protect it from oxidation and evaporation.
- Regular Maintenance: Use a fuel stabilizer annually, even if you use all of your gas within a short period.
Empty the Tank Before Storage:
- Reduce Deterioration: If you’re not going to use your lawn mower for an extended period, it’s best to empty the fuel tank and store the gasoline separately. This minimizes the amount of fuel that degrades in the tank.
Avoid Mixing Old and New Gasoline:
- Consistent Quality: Mixing old and new gasoline can reduce the overall quality of the fuel. It’s always better to use fresh gasoline whenever possible.
When to Replace Your Lawn Mower Gas
It’s generally recommended to replace the gas in your lawn mower every 3-6 months. However, if you see any of the signs of bad gas mentioned earlier, it’s best to replace it sooner.
Consequences of Using Bad Gas
Using bad gas in your lawn mower can lead to various problems:
- Engine Problems: Clogged fuel lines, injectors, and carburetor can cause engine starting issues, reduced performance, and even engine damage.
- Increased Maintenance Costs: You may need to spend more money on repairs if you use bad gas, as it can lead to premature wear and tear on engine components.
- Environmental Impact: Bad gas can leak into the soil and water, potentially harming the environment.
Conclusion
While gasoline does have a limited shelf life, you can extend its lifespan by following proper storage practices and using fuel stabilizers. By paying attention to the signs of bad gas and taking preventative measures, you can ensure your lawn mower runs smoothly and efficiently, keeping your lawn looking its best. Remember, it’s always better to be safe than sorry when it comes to your lawn mower fuel.
Frequently Asked Questions
How long does gasoline stay good in a lawnmower?
Gasoline can stay good in a lawnmower for around 3-6 months if stored properly. However, the quality of gasoline degrades over time, especially when exposed to air and sunlight. This degradation leads to the formation of gums and varnish, which can clog fuel lines and carburetors, making your lawnmower difficult to start or run properly.
To maximize the lifespan of gasoline in your lawnmower, use a fuel stabilizer and store it in a tightly sealed container in a cool, dark place. This helps to slow down the oxidation process and prevent the formation of harmful deposits.
Does the type of gas affect its shelf life?
While all types of gasoline will eventually degrade, some types may have a longer shelf life than others. For instance, ethanol-free gasoline tends to last longer than gasoline with ethanol, as ethanol absorbs moisture and can accelerate the oxidation process.
Similarly, using higher-octane gasoline won’t necessarily extend its shelf life. Instead, focus on using quality gasoline from a reputable source and follow proper storage practices.
What signs indicate that the gas in my lawnmower has gone bad?
There are several signs that your lawnmower’s gasoline has gone bad. The most obvious is difficulty starting or running the engine. The engine might sputter, hesitate, or simply refuse to start. You may also notice a decrease in power or a change in the engine’s sound.
Another indication is a gummy residue in the fuel tank or carburetor. This residue is a byproduct of gasoline degradation and can clog fuel lines and other engine components.
Can I use old gas in my lawnmower?
It’s generally not recommended to use old gasoline in your lawnmower. As gasoline ages, it loses its volatility, making it harder for the engine to ignite and burn properly. This can lead to poor engine performance, damage to engine components, and even engine failure.
If you have old gasoline, it’s best to dispose of it properly. You can typically take it to a hazardous waste disposal facility or a local gas station that offers gasoline recycling services.
How can I prevent gasoline from going bad?
There are several ways to prevent gasoline from going bad in your lawnmower. One is to use a fuel stabilizer, which helps to slow down the oxidation process and prevent the formation of harmful deposits. Another is to store the gasoline in a tightly sealed container in a cool, dark place.
It’s also a good idea to use up the gas in your lawnmower before it gets too old. If you don’t plan on using your lawnmower for a long time, it’s best to drain the fuel tank completely and store it empty.
What if I have old gas in my lawnmower?
If you have old gas in your lawnmower, the first step is to try and start the engine. If it starts and runs smoothly, you’re likely okay. However, if you experience any problems, it’s best to drain the old gas and replace it with fresh, stabilized fuel.
To drain the old gas, simply remove the fuel line from the carburetor or fuel tank and let the gas flow out into a container. You can then dispose of the old gas properly.
How often should I change the gas in my lawnmower?
It’s best to change the gas in your lawnmower every 3-6 months, especially if you don’t use it frequently. This helps to prevent gasoline from degrading and causing problems with your engine.
You should also check your fuel lines and carburetor for any signs of gum or varnish buildup and clean them as needed. Regular maintenance helps to keep your lawnmower running smoothly and efficiently.