QUESTION: A Wheaton, Md., motorist would like to know how often to change his motor oil and oil filter. I have a ... I change my oil every 4, 000 miles and the filter every 8, 000 miles. My neighbor claims my motor will be ruined by this schedule. What is ... I have inquired at service stations and at Rambler agencies if I could use a low-lead gas, but have never received a definite answer. ... The only remedy that I have seen is simple, but is not ( as far as I know ) in the VW ownera#39;s manual.