I recently bought a 5spd 92 civic ex that is in great shape aside from the d16z6 engine. It seems to have damage from a long running detonation problem. It seems weak and it uses about a quart of oil every 400-500miles. I decided I am going to get a new engine. My question is should I stick with the D16Z6 or go with a different engine? Would swaping a 'b' series motor be much more expensive (Do I need tranny and computer too?) Also, is there a specific place I should look when purchasing this engine? Also which do you think I should go with between used, recertified or remanufactured engine? Thanks for all your help!