mid 80's 318 mpg economy numbers...

A bit off topic, but I could use some anecdotes, or actual data for that matter. Just acquired and drove 2000 miles in two day a 65 Barracuda, 273 2 bbl. It has the automatic transmission (nifty console shift). The trip was problem-free, but the car only managed 11miles/gallon. The car is a keeper, runs strongly, but I am not sure what to do about its gas guzzling ways (which I think must be abnormal--yes?). Thanks for nay thoughts you might have. jjc