ammolab
Thread starter
A “specific” oil requirement would be one manufacturer and one part number like Penzoil Ultra Synthetic 5W-30. GM is fine requiring a specification like DEXOS oils, right? So many oils meet this, nothing specific about it.Once a manufacturer requires a specific part or oil in order to keep your warranty valid, they must provide it free.
In my case, HPL "meets or exceeds" API spec. Let them prove otherwise.
I also think a maker saying “meets xmfg standards” isn’t identical to “certified by / licensed by xmfg B3344332 specifications”. You might win a fight, but not without some work.