I recently changed the oil. I now hear a noise after the car warms up. When accelerating at low speeds it sounds like belt. The shop said the put 5w oil but they said the noise does not have anything to do with it. This noise is familiar to me though. I've had heard it before in other cars.

My car is a 1999 Boneville. It'* hard to describe the sound. I would say it'* like a squeal or whine. Not too loud. As I said before it'* a sound I heard before in other American cars. It does it both in neutral or drive while I accelerate. I'ts sort of familiar. However, I just noticed it after the oil change. The shop said it may have spill some oil on a belt or something. It'* been 6 days and still keeps doing it. I wish I know if it'* something I should take care. I like better to prevent a problem than to just let it go.

The noise does it either with the A/C on or off. I'll let you know when I find what it is.