I have done the usual search, but I can't find my answers. I have a 1992 eg hatch and it has the wonderfully fuel efficient d15 with the vtec-e in it. Unfortunately it has 165k on the motor and is about to die. So I'm perplexed with a few newer questions. With gas prices on the dramatic rise, I began to ponder what to swap into the hatch, which is my daily driver (about 75-100 miles a day). My original plan was to do a B18C swap and a small turbo. But now I'm starting to wonder what I should do. I want some pep to the motor, but it's not a race car. So my questions are A)Should I just toss in a sohc vtec and leave it for daily? Should I change trannys? the d15 gearing is horrible. B)Should I go B series and leave it NA? if so, Which swap, LS/b16/or/b18c C)how much gas mileage will I lose if i decide to do a turbo or sc? D)what are the usual gas mileages of the above motors?