I do Justys as well as ea81's. The forum link that Skip provided is a great resource, and GD is right (as usual) about the oil pump. HOWEVER...a '94 with less than 80K throwing a rod means somebody thrashed it and /or didn't change the oil enough, which common. Justy's don't get no respect. The other possibility is that your Justy may have just under 180k. Justy odometers only have 5 digits. The 1.2 liter engine design leaves a lot to be desired, but if you start with a good engine, are good about oil changes, oil levels (they often develop oil leaks) and drive it like it's a 3 cylinder, then the engine will be dependable and go 200,00+ miles before the bottom end needs to be re-done. If you swap an engine, you can expect 35-42 mpg for a FI 4WD or more for a 2WD. If it is 2WD I suggest parting it out and buying a different econo-car. In my opinion, the only reason to own a Justy is the on-the-fly 4WD and MPG combo. Any other car is going to be easier to find parts for, and they will be cheaper. If you can find a de-tuned 1.0 liter Geo Metro Xfi model, it will have better ground clearance than a Justy, and get can get 50-60 mpg.