quote:They can, and do, require whatever oil you use to meet said specs for warranty coverage.
No. They don't. If you're using the spec'd fluids under the prescribed intervals, the manufacture has no recourse in a lubrication related failure.
If a lubrication related failure occurs, whether spec'd fluids are use or not, the lubricant has to be the reason for the failure to deny warranty.
I'm sure you can see the difference between what I stated and what you did.