Pennsoil and Nissan ?
Would be interesting to follow up on who actually makes Nissan ester. I don't believe for a minute that Nissan makes is but does hold the patent. Got some good stuff on bobistheoilguy.com on Nissan ester oil. However, no one is sure who makes it. It is not common enough to generate a lot of interest. I am sure with a little digging that someone will discover the maker and how much ester is has in it. It could be only a small %. Like some oils that advertise being synthetic but only have a small amount of synthetic base stock. Ester is not new. Amsoil makes their compressor oil with it. I would imagine that any good group IV or above would do very well. Will do some digging and see what I can find.
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