Pennzoil Ultra/Platinum not clean for 0w20?

[Johnny248]

I'm sorry if this has been touched on, but I was having a hard time finding anything using the search function.

Anyway, Pennzoil sent me a coupon and it says something along the lines of

#1 Cleanest Pistons*

* does not apply to Pennzoil Ultra 0w-40 or Platinum 0w-20.

What is different about these two oils that it does not have the same cleaning properties of the 5w30 and other oils? I already know the answer to this question, but does this mean that the 0w40 and 0w20 are not a clean oil? and other oils are better at maintaining a cleaner engine?

Just seems weird that cleaning properties would be different between their 5w30 and 0w20. you would think the additives would be very similar even though the weight is different?

 

[Falken]

Maybe the polymers used to give a 0W compete for space in the add pack, so they have to scale back on detergents?

I really don't know.

Maybe the cost of the base oil is more so they reduce cost on detergents?

Maybe thinner oil doesn't hold as much detergents in suspension in cold weather?

Just guesses here.

 

[dgsbikes]

I have the same question. Hopefully there's an answer.

 

[dave1251]

There is some speculation this is due PP 0W20 and QSUD 0W20 are the same formulation.

 

[daves87rs]

I would think it might not be as clean due to the tighter spaces in the new engine...and many of the newer DI/turbo engines are much harder on oil.

So maybe the push right now may be more for protection until these current engines have been out for a while..

 

[KCJeep]

During the recent "high VI" wars one camp seemed to believe higher VI oils would leave more deposits. Maybe there is something to that assertion.

 

[Garak]

Originally Posted By: Johnny248
* does not apply to Pennzoil Ultra 0w-40 or Platinum 0w-20.

Remember that they're comparing to other brands of the same grade. Where Ultra did beat other oils in cleanliness in their 5w-30 test, it wasn't a massively obvious victory. It's quite possible that in their tests, their 5w-30s (and perhaps even 10w-30s) won by this very small margin. They might have lost by a very small margin in grades like 0w-20 and 0w-40. I would think, for instance, that M1 0w-40 would be pretty stiff competition. In any event, Ultra 0w-40 and PP 0w-20 probably "lost" by as significant a margin as they "won" with the 5w-30 grade.

 

[The Critic]

The likely reason is that they were unable to verified the claim on 0w-20. This is because the 0w-20 grade has no set limit for the TEOST 33C High Temperature Deposit requirement.

http://www.gf-5.com/the_story/testing/

See page 4:

http://www.api.org/certification-program...bulletin-1.ashx

 

[demarpaint]

Originally Posted By: KCJeep
During the recent "high VI" wars one camp seemed to believe higher VI oils would leave more deposits. Maybe there is something to that assertion.


Interesting, that was my first thought too.

 

[Trav]

Originally Posted By: KCJeep
During the recent "high VI" wars one camp seemed to believe higher VI oils would leave more deposits. Maybe there is something to that assertion.


+1

 

[Falken]

That makes sense KCJeep.

High VI modifiers, I have heard, lead to deposit formation as the oil shears.

Read it somewhere as a downside to 0W oils on this site somewhere and the reason a lot of people stick to 5W20 etc.

 

[JOD]

Originally Posted By: Trav
Originally Posted By: KCJeep
During the recent "high VI" wars one camp seemed to believe higher VI oils would leave more deposits. Maybe there is something to that assertion.


+1

-1

How on earth would that affect its relative performance to other 0W20 oils, particularly when it has a lower VI than most other 0W20 oils.

Unless of course the super-high VI oils offer some sort of cleaning advantage as well...

 

[JOD]

Originally Posted By: Garak
Originally Posted By: Johnny248
* does not apply to Pennzoil Ultra 0w-40 or Platinum 0w-20.

Remember that they're comparing to other brands of the same grade. Where Ultra did beat other oils in cleanliness in their 5w-30 test, it wasn't a massively obvious victory. It's quite possible that in their tests, their 5w-30s (and perhaps even 10w-30s) won by this very small margin. They might have lost by a very small margin in grades like 0w-20 and 0w-40. I would think, for instance, that M1 0w-40 would be pretty stiff competition. In any event, Ultra 0w-40 and PP 0w-20 probably "lost" by as significant a margin as they "won" with the 5w-30 grade.

Please don't pollute this awesome thread with a perfectly sensible answer...


Originally Posted By: The Critic
The likely reason is that they were unable to verified the claim on 0w-20. This is because the 0w-20 grade has no set limit for the TEOST 33C High Temperature Deposit requirement.

http://www.gf-5.com/the_story/testing/

See page 4:

http://www.api.org/certification-program...bulletin-1.ashx


I thought PZ's claims were based on SeqIII results, not TEOST33? In Amsoil's testing, there were a few oils that performed better than Ultra in that test, including Valvoline Synpower. Of course, I read on the internet that Valvoline causes varnish, so there is that...

 

[CATERHAM]

Yes Castrol Edge, Amsoil SS and Valvoline Syn Power outperformed PU in the TEOST 33 test. Heck even Lucas was a tad better!

But that is a piston deposit test, not an internal engine cleanliness test.

 

[chubbs1]

JOD...lol

I think Garak has this one pinned down the best. Very good thought process.

 

[badtlc]

Originally Posted By: dave1251
There is some speculation this is due PP 0W20 and QSUD 0W20 are the same formulation.


You can tell by the different NOACK that the two are not the same formula.