Quote:
Originally Posted by Robert_Nash
It appears that a basic requirement for an "ester" oil is that it belongs to a "group V" synthetic (and not all synthetics are group V)...whether Pennzoil Platinum is or isn't an ester based synthetic I don't know and haven't been able to find out; even on Pennzoil's website.
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If the base oils are the same then I believe the esters can be added during manufacturing easy enough. Some of the descriptions on the Penzoil website were similar to the Nissan ones but it was by no way definitive.
Need the oil doc!