OVERKILL
$100 Site Donor 2021
They should be consistent with their numbers, I don't think it's that hard, considering that they're the largest oil company in the world. Maybe we should ask Mobil 1 which numbers they consider to be true, as their PDS documents are nothing more than a verbatim copy of the tables on their website.
It's the other way around, the tables on the website are a verbatim copy from the PDS.
And yes, while it would be nice if things were consistent, this is not the first time that there have been inconsistencies between various data sets from the oil companies. Shell had some significant bugger-ups going on for ages for example.
The MSDS isn't required to be accurate/detailed on things like viscosity, pour point...etc. Things that aren't relevant to the hazards that might be present with the product. This is the same reason that the constituents that are called out are done so in ranges. Some companies use FAR less specific ranges than Mobil, like 0-90% for example. We should be thankful that Mobil at least shows us reasonably narrow ranges on the base oils they do choose to call-out in this case.
If there is a discrepancy on a product quality between the MSDS and PDS, the PDS should always be assumed to contain the accurate figure, since its purpose is to convey those specifics, quite unlike the MSDS.