Hey all - I just bought some Pennzoil Ultra Platinum 5W20 from Amazon, and noticed a bit of a discrepancy. On Amazon'z site, the picture of the bottle shows it meets WSS-M2C945-B1, however the two 5QT bottles I received have the older WSS-M2C945-A specification. To further complicate things, the text description on both Amazon and Pennzoil's own website show WSS-M2C945-A.
I've sent Pennzoil an email (will be impressed if a big company actually answers) but wanted to see if anyone here had insight. I suspect oils that meet SN Plus wouldn't reformulate for WSS-M2C945-B1, but I am having trouble finding much information on it.
Edit: Reason I even care is my car's owners manual dictates WSS-M2C945-B1, hence I want to be somewhat careful.
Last edited by climhazzard; 06/14/19 08:03 PM.