Last year for reasons I won't go into, my wife and I decided to stimulate the economy by buying new vehicles, she a sedan and I a Van. On Friday I took one of them (I always take her's for service) for an oil change and a new vehicle service check up. After the check up, they put a sticker in the window saying when the next oil change/service is due.

I noted that they want one vehcile serviced/oil changed at 3000 mile intervals and the other is at 5000 mile intervals. Not a big deal considering that they are two different types of vehicle but it got me to wondering.

My quiestion is: with today's supposedly more efficient vehicles AND OIL, once a vehilce has had the first two or three service checks, how often and after how many miles should the oil be changed?

Thanks for your opinions,.

Grumpy