It depends on the D16. You have a DX, I'd say no. Don't do anything to it. Don't bother buying an engine and parts for when you turn 18, anything could wind up happening to your car or your license, so doing that could turn out to be a waste of money; and modifying your car will only reduce it's value if for some reason you decide to sell it and start with a different chassis. Take care of your legal stuff and finish school first. If you stockpile anything for it, it should be money.