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All pictures and texts in this web page are the property of nomaallim.com. Any use of any part of those contents without the written consent of nomaallim.com shall be subject to legal procedures as per international and local laws in the concerned country. Using the name "nomaallim" or "nomaallim com" or "nomaallim.com" in the text describing the unauthorized copied content shall not constitute an exception and shall be sanctioned in accordance to the effective laws and proceedings.
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DISCLAIMER:
Our pictorials are of informative nature and do illustrate works carried out by ourselves at our own premises for our own use and satisfaction. Readers who envisage to carry out similar works inspired by the below method shall do this at their own risks and liability. |
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What is varnish? Old vs. New gasoline
To the left, new gasoline: clear color, good transparency, strong smell resulting from strong vapors.
To the right, 5 years aged gasoline as extracted from a car tank: dark color like cola or any caramelized drink, increased opacity, less smell due to evaporated liquid. This is when gasoline turns into the so-called varnish.
To the right, 5 years aged gasoline as extracted from a car tank: dark color like cola or any caramelized drink, increased opacity, less smell due to evaporated liquid. This is when gasoline turns into the so-called varnish.
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Fresh unleaded 95 gasoline
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5-year old varnish resulting from unleaded 95 gasoline
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Symptoms of old gasoline in an old or classic car and how to fix them
Symptoms of old gasoline may be persistent or intermittent:
- Difficult (long) starting of the engine
- Misfires
- Engine fault warning light (MIL) comes on while driving
- Abnormal engine vibrations and noises
- Rough idle
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How to solve stale gas problem after leaving a vehicle unused
If your vehicle has been left unused for more than 3 months and you have experienced the above symptoms when restarting it, you must proceed as follows to remedy these malfunctions:
- Empty the tank
- Disassemble and clean the fuel pump
- Replace the fuel filter
- Put new Gasoline in the tank
- Start the engine
- Clear engine fault codes
How to prevent gasoline from deteriorating and turning into stale gas or varnish
To avoid having problems with your vehicle after returning from a long trip, you can take the following precautions before leaving:
- Do not leave too much gasoline in the vehicle, or even leave only the bare minimum, even if the fuel level warning light is on.
- Add a little gasoline stabilizer, otherwise the whole bottle in case your tank is more than half full
