time in a (rusty) bottle

I lived in Oklahoma for several years, but I never heard about this:  In 1957, Tulsa buried a time capsule, to be opened in 50 years. But because Oklahoma City had buried a time capsule earlier, Tulsa just had to outdo them. How? By including a brand-new 1957 Plymouth Belvedere.
Unfortunately, the concrete vault that the car was placed in, designed to withstand a nuclear blast, turned out not to be so good at resisting ordinary groundwater. The car was resting in water "halfway up on the car's fenders", along with evidence that water (described by witnesses as "looking like chocolate milk", which is never a good sign) had been up to the top of the vault at some point(s).
This is not good news when the buried car in question is one that had a reputation for being rust-prone when not submerged.
Still, there's some hope. The car had been coated with a rust inhibitor (described by some as "grease"), and wrapped in a plastic bag that was "supposed to protect materials 'for 1,200 years' from rust". This statement looses a bit of cachet when one considers that bomb-proof bunker the bag was put in, however. But if you look at the photo, you can see that the bag is still car shaped, which it probably wouldnt be had the car gotten too rusty. I hope.

Oh, and the reason that the article caught my fancy in the first place: Inside the vault was placed a tank containing 10 gallons of gasoline and 5 quarts of oil, just in case internal combustion engines had become "obsolete" by 2007. Considering the current quagmire that is the middle east (not just Iraq), and how the whole reason anyone cares about that region for any purpose other than archeology and eschatology is due to that damned internal combustion engine. It should've been obsolete. To our sorrow, it is not.

And finally: 10 gallons? That'll get a Belvedere, what, 120 or 140 miles down the road? Maybe?