I've been looking at 92-95 civic hatchback vx's for the past few months trying to find a car which is good on gas. I've looked at metros, and other cars which are good on gas but the civic hatch appeals the most to me. My first intention was to buy a vx or buy a hatch shell and swap a vx( d15z1) motor in. After doing some research I've come across the d15b three stage vtec-e jdm motor which claims to deliver the same fuel effciency as the d15z1 as well as producing 130 hp. I also have seen that there is a d13 engine out there somewhere. I want to know is it possiable to put the d15z1 head onto a d13 block?? I think the best set up would be the d13 block with the z1 head. But i dont know much about these hondas yet. Can anyone tell me what the best route would be to go with this? Again my goal is fuel effciency not power. As long as I get enough HP to merge on the highway and reach 70mph with out revving the hell out of the engine.