Oil never goes bad. It's a myth. Do research on it. It gets dirty but doesn't go bad, and it could be filtered out. here
See full version: Does 2 cycle oil ever go bad
Oil never goes bad. It's a myth. Do research on it. It gets dirty but doesn't go bad, and it could be filtered out. here
Two stroke / engine oil does have a shelve life. Most experts state 4 to 5 years in a sealed container (they are dated) and 1 to 2 years max, if it has been opened.
Considering this, does Stihl 2 cycle oil go bad? here
Beside above, how long does unused oil last? Unused, unopened and stored in its original container out of extremes of temperature, motor oil will last for an “extended period”. They then go on to suggest that the oil shouldn't be used after a few years; the exact period varying between 2 years (according to Total) up to 5 years (Mobil). more
Does motor oil go bad over time? here
I’ve often received questions about whether two cycle oil has a shelf life, and if we’re talking about unused oil sitting on a shelf, then no. There’s no reason you can’t use two cycle oil that was refined even 50 years ago, though it won’t contain the same additives as newer oil. However, you shouldn’t leave oil in your oil tank for more than a year without use. Under these circumstances, the oil can solidify and become quite gelatinous. When the engine is started with this kind of oil inside of it, it can cause serious damage. here
The real reason you would use Yamaha 2S oil over Pennzoil two cycle oil made in the 1950s is because the additives in the newer oil will help your engine to run better. In addition, you don’t know whether those older oils are TC-W3 certified; most certainly they wouldn’t meet the modern standards for two cycle oil.
Now you should know whether you can still use the oil that you have been storing for a few months. While it takes a while for 2 stroke oil to reach its expiry date and not be usable, the factors I’ve outlined can influence that date and accelerate spoilage.
The rest of this article will discuss the factors that cause 2 cycle oil to go bad. And don’t miss out on the tips to prepare the perfect gasoline and 2-cycle oil mixture for your equipment!
Lastly, when preparing the mixture, do not use a gasoline type that contains more than 10% alcohol (usually labeled as Ethanol). Alcohol will attract moisture over time.
Any of these can spoil the quality of the oil and damage a 2-stroke engine.
The last category of oils that you can find on the market is semi-synthetic oils. These are a blend between the incredibly modern synthetic oils and high-quality minerals. These benefit from the qualities of the two parts. here
However, the quantities of gasoline and oil that you will add to the blend, or their ratio, can vary depending on factors such as: [links]
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Stihl demo saws, chainsaws.
Secondly, I really kinda dread it the moment a customer thinks they have something great to give me, LOL, thou I must admit I did get a cool Honda riding lawn-mower once which I fixed back up and sold for 300 dollars Most the time, thou, it makes me feel like Sanford & Son, heh. [links]
Doing all design/build now! more