- Joined
- Jul 22, 2023
- Messages
- 194
I went through the API rodeo with Hyundai. I can't speak for Subaru, but I got confirmation from two Shop Managers at two different dealerships that Amsoil SS will never cause a problem from a warranty perspective. Both of those guys said Amsoil is amazing and sometimes they use it at the shop, although I'm not sure if it's SS or OE or what.The first link isn't working. I'd like to stick with API SP-RC for warranty purposes.
5w30 SS is what I was referring to. Thanks
Point being, I got comfort that SS won't be an issue given it exceeds API specifications. It's more about what they see in the engine (e.g., sludge). OCI is by far more important as to what they look for.