It's still at about 12 1/2 mpg. I don't think that my old '66 Porsche 911 did that well back in 1969 when we covered 200 miles in New Mexico (going north from Alamagordo Air Base) in 1 hour and 50 minutes.

The '66 Maserati Quattroporte which replaced the '66 Porsche in '76 would cruise at 120 nicely, but get about 7-8 mpg.