[count-your-change]

I worked at a FBO in the midwest and storage of 100LL was never a problem even after years. Some people purchased it just for that reason, to store as an emergency fuel.

[Errant]

Yep. If there was a storage problem with 100LL, the FAA would require shelf-life records and small aircraft that sometime sit for months, would be falling out of the sky on a daily basis.

I've used it in my airplane, motorcycles, lawnmower, power-saws, generators and etc with absolutely no problems; storage or otherwise. But I won't use it in my trucks unless I have to.

There is another fuel probably worth investigating for unlimited storage life: butynol or butyl alcohol. And of course propane or CNG if convert your vehicle to use these.