[spike021]

Are there any generally accepted opinions on how to handle oil change intervals when it comes to using heavier weight?

For my recent track day I went up to 05-30w, which is heavier weight than stock. But according to the shop that did some work, including the oil change, it should be due for another oil change after about 4 months or 3-4k miles. That's quicker than factory spec.

Do intervals usually matter when it comes to the viscosity of the oil currently sitting in the car or no? The reason I ask is because I'm wondering if I can go by the standard, manual interval for our car or if I am required to follow the interval the shop wrote on the windshield sticker.

Thanks!