Bringing up the dead...
At one of our camps we had about 500,000L of diesel fuel that has been sitting in tanks at the tank farm since the mid 80's when they shut down the project. Its the ugliest and most rotten smelling diesel i have ever seen in my life but wow does it ever work good. For fuel thats been sitting around 20+ years i would have thought that the only thing it was good for was burning in the oil drip stoves but the old cat loves it (old JD350C that had been sitting out there since they shut down). Being such an old engine it probably wasnt designed for ULSD and runs like a bag of crap on it.
Diesel is a totally different beast compared to gas, i bet if those tanks were full of 20+ year old gas a guy could drop a grenade in it and nothing would happen