Rajan Wilcox
RC fuel can go bad if left sitting in its tank or can for extended periods. The fuel can last for over a year if stored properly, but it will eventually degrade and may cause engine problems. One of the most common reasons RC fuel goes bad is moisture contamination, which can be caused by exposure to the atmosphere or by condensation forming inside the fuel tank. Another indicator of degradation is a change in the colour of the fuel, which can be caused by exposure to direct sunlight. To prevent RC fuel from going bad, it is important to store it in a cool, dry place and to follow the manufacturer's instructions for storage.
| Characteristics | Values |
|---|---|
| RC fuel shelf life | RC fuel does not last forever and can go bad over time, especially if it is not stored properly. |
| RC fuel going bad | RC fuel can go bad if left sitting in its can for a long time. One of the most common reasons is moisture contamination. |
| Preventing RC fuel from going bad | To prevent RC fuel from going bad, it should be stored in a cool, dry place, away from concrete surfaces, sunlight, and sources of ignition. The container should be tightly sealed. |
| Signs of RC fuel going bad | Signs of RC fuel going bad include changes in colour, the presence of droplets of condensation, a longer burn time, and engine problems such as rough idling, stalling while speeding up, or failure to start. |
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What You'll Learn
RC fuel can go bad from sitting
One of the most common reasons RC fuel goes bad is moisture contamination. Methanol, a component of nitro fuel, can easily absorb moisture molecules from the atmosphere. If moisture gets into the fuel, it won't work properly and can cause issues with your engine. To prevent this, it's important to store your RC fuel in a tightly sealed container, away from sources of ignition and direct sunlight, and to follow the manufacturer's instructions for storage.
Another way to know if RC fuel has gone bad is by its appearance. If the fuel has changed colour or developed globs of gel or uneven colouring, it has likely started to varnish and is no longer usable. The less colourful the fuel, the more it has degraded. While you may still be able to use the fuel, it might not generate as much energy as before.
RC fuel can also go bad from sitting for extended periods. If you're not planning on using your RC car or plane for a long time, it's best to empty the fuel and run the vehicle until it dies to ensure no fuel remains in the tank or fuel lines. This will make it easier to start the vehicle the next time you use it.
While proper storage and usage can help prolong the life of your RC fuel, it's important to note that even stored fuel has a limited lifespan. As a rule of thumb, it's recommended not to use RC fuel that has been sitting for more than a year.
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Nitro fuel colour change
Nitro fuel can go bad if left unused for too long. While it has a long shelf life, it is generally advised not to use nitro fuel after a year of sitting around. However, some users have reported using nitro fuel that has been stored properly for three years or more without any issues.
There are several signs to look out for to determine if nitro fuel has gone bad. One indication is a change in colour. Nitro fuel typically comes in various colours such as red, blue, orange, purple, and green. If the nitro fuel changes colour and develops globs of gel or uneven colouring, it has likely started to varnish and is no longer usable. Another sign is a change in consistency, where the fuel becomes thick, gummy, or watery. Additionally, if moisture gets into the fuel, it may cause strange behaviour in the motor.
It is worth noting that the colour of nitro fuel is primarily for identification and safety purposes and does not affect its performance. The specific colour is often chosen by the manufacturer to give their fuel a signature look. In some cases, the colour change may be due to the use of a different dye by the manufacturer, but this does not indicate a change in quality.
To prolong the life of nitro fuel, it is recommended to keep the original cap in the bottle neck to ensure a tight seal, and store it in a cool, dry place, off the concrete floor.
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Moisture contamination
One of the main issues with moisture in RC fuel is that it can cause the fuel to oxidize and break down, leading to a range of issues. Over time, water can cause the fuel to become gummy or watery, with a thicker consistency. This can affect the performance of the engine and, in some cases, even cause complete engine failure.
To prevent moisture contamination, it is important to store RC fuel tanks in a cool, dry place, away from direct sunlight or extreme temperatures. It is also crucial to ensure that the fuel tank is tightly sealed when not in use, as this can help prevent moisture from entering the tank.
Regular maintenance and inspection of fuel tanks are essential to identify any signs of moisture contamination. One way to detect water in a fuel tank is to check for hazy or cloudy fuel, which indicates that water is building up. Additionally, the presence of globules or uneven coloring in the fuel can also suggest that the fuel has started to varnish due to moisture exposure.
Using specialized filters, such as Hydrosorb® filters, can help absorb small amounts of water that may be present in the fuel. These filters can also help identify water problems, as plugged filters may indicate that there is an excessive amount of water in the fuel.
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How to store RC fuel
Nitro fuel can go bad if it is not stored properly. It can get gummy or watery and it is recommended that you do not use it after a year of sitting around. To properly store RC fuel, you should:
- Store it in a cool, dry place, off the floor, and away from concrete as it can attract moisture.
- Keep it away from direct sunlight, heat, sparks, or static electricity.
- Store it in a tightly capped, preferably lined metal container, in its original bottle with the lid screwed on tight.
- Keep it in a place with a fairly constant temperature, such as a closet.
- Avoid storing it in glass, old cans, or cans with non-plastic liner lids as they may spark.
- Avoid storing it in the garage, especially if it is unheated/uncooled.
- Avoid storing it in direct sunlight as ultraviolet rays could break down the fuel.
- Avoid storing it next to 110v outlets.
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What to do if fuel goes bad
Nitro fuel can go bad if it is left sitting for too long. This is especially true if the fuel is left on a concrete surface, as the nitromethane will leech out. Racers claim that if the fuel is more than 6 months old, it is no longer usable. However, some people have used fuel that is 3 years old or more without any issues. The rule of thumb is to never use fuel that has been sitting for more than a year.
If your nitro fuel has turned a different colour, it has likely gone bad. If it is still clear, then it is probably fine. If you see globs of gel or uneven colouring, the fuel has likely started to varnish and is no longer usable. If the fuel has separated, it has gone bad.
If your RC vehicle is acting strangely, it may be due to bad fuel. For example, if the carburetor trim adjustment is not working properly, or the vehicle instantly dies when you snap the throttle open or closed, bad fuel may be the culprit.
If you suspect that your fuel has gone bad, the best course of action is to drain the old fuel and replace it with fresh fuel. It is also recommended to replace the glow plug and clean the carburetor. You should also check the fuel tank for any blockages and replace all fuel lines.
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Frequently asked questions
Yes, RC fuel tanks can go bad after sitting for a long time. This is usually due to moisture contamination or exposure to direct sunlight.
RC fuel can go bad in less than a month, but it can also last for over a year if stored properly. A rule of thumb is to not use RC fuel after a year of sitting around.
You can tell if RC fuel has gone bad if its colour has changed, or if there are droplets of condensation inside the fuel bottle or on the underside of the lid. The fuel may also become thick and gummy or look like water.
If your RC fuel has gone bad, you should replace it with fresh fuel. It is recommended to empty the old fuel and run the vehicle until it dies to ensure that no fuel remains in the tank or fuel lines.
