lso what viscosity should i use? on the spark plugs what brand and part#, also should i change the spark plug wires also?and last the brake fluid, what kind should i use? also one more thing how much did all you guys get your o2 sensors changed for? i have 4, thanks for your help, Mark

paragraph cut off,.....any way i was saying the car has 104,000 going in for my 1st oil change since i got the car, im prety sure the last owner didnt use synthetic oil, would it be alright to change to synthetic now? also what viscosity? thanks again

1. Oil - Mobil 1 5W-30 for winter. Changing to synthetic is OK.
2. Spark plugs - NGK BKUR6ET-10 (3-electrode)
3. Do you know when the timing belt, water pump, thermostat, etc. was changed? Should be done every 60K to 75K miles

Just to add:

You need to replace only two O2 sensors in the engine bay. Two others are behind cat. converters (they have 4 wires) and they live longer.

Also switching to synthetic oil might introduce litle oil leak so if you do it, whatch the oil level.<ul><li><a href="http://dev.12v.org">here is nice site about the maintanance</a></li></ul>