O2 sensors are pretty easy to do, oil changes are also very simple. I would recommend changing the fuel filter, when you change the fuel filter have new hose clamps ready cause the old ones are a pain to get back on. I have run a few tests and my 98 likes premium. On my trip back to school last night I averaged 39.5 MPG according to the onboard computer (220 mile trip, average speed 55MPH). The wires should be good for 100+K miles according to my dealer. But I would replace spark plugs. Air filter, coolant flush, and basic visual inspection. Other than that you should be Good |