[Presidio335xi]

If it is kept in an airtight steel drum and out of the sun does it go bad?

Same goes for high octane race gas? I know fuel does go bad eventually, so if I have had it for 6 months in an airtight steel drum out of the sun light is it still good?

Thanks

[cwn23]

As long as it is not in sunlight or exposed to air the shelf life on it has to be long IMO.

[Jeff@TopGearSolutions]

Should be fine in a sealed drum but its a gray area. Only way to know is to measure its weight ( see google for formulas). For purposes and intents we need for its fine. Use it!

[max]

Short answer for what we use it for is NO.
If it's kept in a sealed container it has a very very long shelf life. In the industrial/commercial chemical business it has been stored in sealed containers for 10 years and still tested good, i.e. met sales specs.

[Presidio335xi]

Good stuff. Just to confirm.....both race gas AND meth should both be good to go after 6-8 months if they were stored well for 1/4 and auto X?

[Willizm]

Now, what about having a mix of meth in the windshield washer reservoir for say a month? I don't go through meth that often so it might be in there for a month or hell maybe two!

[max]

Originally Posted by Presidio335xi

Good stuff. Just to confirm.....both race gas AND meth should both be good to go after 6-8 months if they were stored well for 1/4 and auto X?

Race gas is a VERY different animal than methanol and can go bad after ~ 1 year.... there are gasoline preservatives sold over the counter that you can add to make gasoline (of any type) last longer before gums and varnishes form. But as you said for 6-8 months your race gas will be fine - keep it sealed and in a cool place out of the sun.

Methanol kept sealed will last for years and years and not go bad and needs zero added to it. The worst that will happen with pure methanol is that it will evaporate away.

[max]

Originally Posted by Willizm

Now, what about having a mix of meth in the windshield washer reservoir for say a month? I don't go through meth that often so it might be in there for a month or hell maybe two!

Same thing with methanol + water - it will last for years and years if kept sealed. Again the worst that will happen is that it will evaporate away. Now if you have anything else in your ww mix besides methanol and pure water then it's a different story.