We have an 07 CTS with 54,000 miles and I am switching over to Amsoil in the transmission. Car is generally driven in a less than spirited manner. Probably 70% hwy.(one auotcross event and a very occasional foot to the floor by me. It's primarily my wifes car)
So, should I have the filter changed too at this point? Or just have it changed?
So, should I have the filter changed too at this point? Or just have it changed?