Gas mileage 225 Slant 6

I consistently get 16 mpg with my slant in a 68 dodge dart 2 door H/T with a 1976 OD 833.

I am kinda a lead foot and with a slant you have to be a lead foot to push it to keep up with today's traffic.

Don't expect much from a slant, sure it's only a six cylinder but it's also a heavy and very old engine that was designed to run at 55 mph or less, more so on the less part.