3000rpm @ 60 is not high for a 1390cc, that's what the 1.5L Toyota engines are geared for. I like to complain all the time about this, but my 1.8 is geared for 3300 @ 60
Since your trips are nice and long, I bet you could see 50-60mpg. Maybe keep the number at 50 in your head, so you have a higher chance of feeling good about yourself. I only get 30mpg but my engine burns oil, my gearing sucks, and I am always driving with a cold engine.