If you baby it as much as my GF, you would get great fuel economy. I doubt you could, she drives sooo easy. You should try it just once for a tank and see what kays you can get out of it.

700+kms a tank for highway driving no worries. I think honda quotes 9.1L/100kms combined. This means it would use stuff all on the highway, unless on high cams. vtec in 6 gear for me is well over 200kms/h. I haven't tried it......yet