i just got a datsun 280z from a friend, it had been sitting for a few months and i guess it just needed a battery and the clutch needed to be bled. i got it running and drove it home, the engine ran nice and smooth. i had been taking it out every other day or so, just driving around the block, and like the 4th or 5th time i drove it it just stalled.. now whenever i start it it feels like its missing or something, i pulled the spark plugs and they are all coated in oil. does this mean i need to rebuild my engine?? i mean, it ran fine before, when i drove it home. i havent changed the oil or anything. the only thing i did to the car since i got it was put a new battery in and top off the clutch fluid, and fill the gas tank. the wires seem fine, what type of spark plugs should i get? whats the difference between the resistor and non resistor plugs? i was looking at the ngk plugs because i know thats what everyone seems to rave about in this forum, but which one? there are many different kinds that i have seemed to find that fit a 78 datsun. i live in california, and it can get to 100 degrees outside.. i dont know if that makes a difference or not. also, what type of oil should i put in? since i havent changed the oil since obtaining the car, i know it should probably be first priority. what grade should i get? synthetic or non synthetic? thanks guys. keith