man, thats teribbly low. My buddy had a Pulsar a few years back with that same set up and it got about 24. He beat the crap out of it too, so his 24 is low even.
My new to me 87 Nissan Pulsar NX XE with the E16i and a 5 speed gets about 30 normal. I hit 34 with the first tank but thats when i was just learning to drive 5 speed last week. Shifted low and was on straight long roads a lot