Just a little follow up.I own a Toyota and I know they spec ILSAC GF-5 for there 0w20. The ESP X2 does not carry that spec, which is why it wasn't listed. Your right it carries a lot of specs. for European vehicles as well as the new diesel option for GM's half ton pickup trucks. Why not use Mobil 1 EP? That would be more identical to TGMO than ESP X2.
I e-mailed Exxon/Mobil. My question, and their response are as follows:
Question: I'm very interested in your Mobil 1 ESP X2 0W-20 motor oil, and I see that it is listed as one of the recommended oils, according to your website. I own a 2019 Toyota Tacoma SR5 with the 3.5L, V-6 motor. My owners manual clearly states "Oil grade: ILSAC GF-5 multigrade engine oil." Does your Mobil 1 ESP X2 0W-20 motor oil meet this specification? Do you have any documentation, such as a Product Data Sheet, that illustrates this?
Thanks for writing to us. We cover the GM DexosD spec, VW 508 00 and VW 509 00 specs, Porsche C20 spec, Mercedes MB 229.71 spec, and Jaguar/Land Rover STJLR .51.5122 and STJLR.03.5006 specs with Mobil 1 ESP X2 0W-20. https://www.mobil.com/en/lubricants...s/our-products/products/mobil-1-esp-x2-0w-20/
For this particular niche market product, meeting these OEM criteria was more important than meeting ILSAC criteria. Sometimes two criteria are mutually exclusive. If this were not the case, all OEMs would be satisfied with third party certifications and would not waste time and money developing and certifying to their own in-house specifications. It's definitely made the motor oil aisle at the store more complicated than it was 40 years ago.
He then followed up and said, "I see I trimmed out part of your question/answer in my editing process. If Toyota calls for a GF-5 rated oil in the manual, this will not be a suitable product. The majority of our 0W-20 oils, however, cover the now obsolete GF-5 and the newer GF-6A specs from ILSAC. The good news is, those oils are also a lot easier to find, while people who NEED to meet one of the OEM specs on the Mobil 1 ESP subfamily of oils have to work a little harder to get them, as they are rare by comparison."