I think Pennzoil should drop the 500K engine warranty (which is joke, IMO), and just warranty against any lubrication caused failures within a 15K OCI, with the obvious stipulations and exceptions.
I think a cool and different marketing enticement would be one free UOA from Pennzoil's lab of choice with your first purchase of Ultra to help determine extended OCI suitability, with results sent to both the owner and to Pennzoil.
Sounds expensive, but the UOA labs might love it as it could hook some people on UOA and it would definitely spread awareness of it.
I'm not an accountant, in case you can't tell.
I think a cool and different marketing enticement would be one free UOA from Pennzoil's lab of choice with your first purchase of Ultra to help determine extended OCI suitability, with results sent to both the owner and to Pennzoil.

Sounds expensive, but the UOA labs might love it as it could hook some people on UOA and it would definitely spread awareness of it.
I'm not an accountant, in case you can't tell.
