Here's my update for April 2011: I filled up the caravan one time. That's it.
I rarely drive long distances now because the US Dollar is getting weaker every week. It cost me $51.35 to buy 13.771 gallons of gasoline (89 octane, 10% ethanol). Too bad we don't have silver in our currency anymore; 1 quarter from 1964 (90% silver, 10% copper) can buy 2 gallons of gasoline! 25 cents for 2 gallons of gas, can you imagine that? Damn you, paper currency, that has no intrinsic value and can easily be debased!
264.2 miles / 13.771 gallons = 19.2 mpg
Caravan odometer = 176,408 miles