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I haven't bought may Mopar oil recently but am impressed with the posted nomenclature!!

Thanks
Randy

 

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Agree. Synthetic oil made from Group IV stock is truly synthetic. At best, most synthetic oils (such as Mobil 1) are made from Group III stock which is at best a semi-synthetic oil.
Lots of confusion possible at the local store!! So, you are saying Mobil 1 is not a full synthetic?

Pennzoil is factory fill. I get the oil the engine was tested with. No worries!! ;)

The minivan gets 'normal' Pennzoil. 5w-20.
 

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Virginia Gentleman
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Lots of confusion possible at the local store!! So, you are saying Mobil 1 is not a full synthetic?
That's what I've read or been told. Check the fine print is what I'm saying. Some synthetics are synthetic in name only.

From Wikipedia:
In 1998, Mobil sued Castrol over the discovery that Castrol was processing conventional oil and calling it synthetic. At the time, Mobil 1 was still created using a true synthetic basestock, which is more expensive. Mobil lost the lawsuit, and, as a result, the "new" definition of 'synthetic oil' became much looser. In order to stay competitive, Mobil needed to downgrade their process to the more affordable process. The result is a hydrocracked, hydroisomerized conventional oil. Lubes N' Greases magazine has reported shortcomings in the ability to pass the tests that the original Mobil 1 formula was able to.[3]
 
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That must be why they don't have the Chrysler MS standard printed on the oil container...... o_O ???
 
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