Interesting they choose a Rabbit vs the Dasher. I had a Dasher and it got easily 50+ mpg in its stock form. It took like 5 miles toget to 55mph. It was a 1.3 L engine 90 CID if I remember correctly. The cylinders were smaller than a coke can and if you didnt retorque the head, you were asking for a gaskin replacement.
I bet with eco mods that got int he mid 70s, but I sent mines to thecrusher in 00.