Quote:
Originally Posted by Mr.ac
You make me faceplam, and question your generation.
Joking aside,
As long as don't store it in an open container, oil will go "rancid" in about 10 years and that if you have oil from the 80's. Today's oil would be good for up to 20 years.
So yeah it's an old myth
Like others said, either keep it in the garage or keep it in the trunk.
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Not entirely true. Synthetic oils will absorb moisture out of the air. That said, as long as the container is sealed, it will only absorb the moisture out of the air that is sealed in the container, which is next to nothing. Just don't go opening the container all the time.
I keep the remnants in the bottle and just throw it on the shelf for the next oil change. If you are really worried about it, you can buy a hydrometer on the internets, they are pretty cheap. Don't expect to find much moisture though. The oil in your pan is likely to have more moisture than the oil in the old bottle.