First, if the oil hasn't been changed on a regular basis, I would recommend using standard oil and changing it for every 1K for the first couple times. Oil has a detergent in it to help keep the engine clean inside, so use the cheap stuff to do that. After that, if you are not hard on the car, conventional oil is fine if you change it every 3K. Synthetic oil is much more expensive and is better, but was really designed for high performance vehicles that are under heavy loads most of the time.
The vehicle I just sold had 254K on it and all I ever used was conventional oil. It still ran good when I sold it. Also, always change the oil filter when you change the oil. Otherwise all you do is have the fresh oil clean out the old filter.
Let me know if you have other questions.
Monday, June 1st, 2009 AT 10:48 AM