Petrol Storage

[aspqrz]

I am doing some preliminary research for a post-apocalyptic scenario and I know that refined petroleum products have a definite (and short-ish) storage life before they become unusable (unless you add restorative chemicals) ...

Petrol (Gasoline) I've seen quoted online as having a storage life of 3, 6 or even 12 months (6 months seems to be slightly more common than the 3 or 12 month data points).

Diesel storage life seems to be the same.

How about things like Kerosine or Alcohol (methanol and ethanol)? Or other common fuels.

And how about biodiesel like canola or soybean? I am guessing they also become unusable over time ... but I can't find any data (I probably don't know enough to input the right keywords into Google search) online.

Does anyone have any first hand knowledge (or can anyone point me in the direction of some usable online data)?

Also, assuming no chemical conditioners or restoratives are available to reconstitute fuel that has passed its use by date, can it be recovered in other ways (re-refining it, for example)?

Phil McGregor
(Road to Armageddon, Orbis Mundi2)