I asked Pennzoil about their multi-vehicle atf fluid. See below:
Dear Pete,
Thank you for your inquiry.
Pennzoil Multi-Vehicle automatic transmission fluid does meet the service requirements and is completely compatible with the Toyota Type T-IV spec. The Pennzoil Multi-Vehicle atf does not meet the Toyota Type "WS" spec.
Best Regards,
Technical Service
Here is the question I asked them:
Your technical sheet indicates that Pennzoil's multi vehicle ATF can be used in Toyota transmission. Does that include Toyota Transmissions that specify Type IV? And is the Pennzoil multi vehicle ATF compatible and can it be mixed with the Toyota Type IV?
Thanks for your help.