hrmm looks like someone needs to research and figure out for themselves. you could swap any of a shit load of motors into that car all with different benefits. Im not nor will anyone else list all these options for you. Im sure you already have some sort of idea what the most popular swaps are out there so why not start with those and see which one will suit your needs best. For what you said you want to do the DX engine is still capable of speeding on the freeway.... Its not all that hard to get up to 80 or 90 even with your stock engine, It just takes a little more time to get there. Plus only a few engines will beat your current MPG.