[bluesubie]

Originally Posted by 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!

Have a look around this forum for some used oil analyses. UOA’s are posted on this forum under tracked conditions going even beyond the manufacturers recommended intervals.

MYTH: When motor oil becomes dark, that means it's time to change it.

This is not true. You cannot determine the life of motor oil by looking at its appearance since it may change color for several reasons. To ensure the best quality product, the best oil change tip is to always follow your vehicle’s owner's manual guidelines for oil change intervals.

https://www.valvoline.com/about-us/f...otor-oil-myths