[GLHS60]

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

Thanks
Randy

 

[DC-93]

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.

 

[Doug D]

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]

 

[DC-93]

That must be why they don't have the Chrysler MS standard printed on the oil container...... ???

 

[71Charger_fan]

I think Mobil 1 sold outside of the U.S. is still full synthetic.

 

[DC-93]

I think Mobil 1 sold outside of the U.S. is still full synthetic.

Maybe our Canadian friends can comment.