Will the chemistry of low visc oils catch up to physical properties of thicker ones

[StevieC]

Originally Posted by Direct_Rejection
Pertinent to this thread...

Mobil 1 Extended Performance 0W20

OR

Castrol GTX 10W30

Which oil ? .

Hypothetical vehicle is spec'd for a 0W20 or 5W20 oil.
Neither fuel dilution nor freezing cold starts are issues.




M1 EP 0w20. Synthetic and better ad-pack than conventional 10w30 Catrol GTX.

 

[DirectRejection]

Thank you.
Personally, I have always been big about base stocks.
M1 has all that PAO at Walmart prices...kind of a no brainer.
I hope some old schoolers chime in.

 

[hatt]

Originally Posted by Direct_Rejection
Thank you.
Personally, I have always been big about base stocks.
M1 has all that PAO at Walmart prices...kind of a no brainer.
I hope some old schoolers chime in.

What's wrong with M1 10w-30 EP?

 

[ka9mnx]

Price?

 

[DirectRejection]

Originally Posted by hatt
Originally Posted by Direct_Rejection
Thank you.
Personally, I have always been big about base stocks.
M1 has all that PAO at Walmart prices...kind of a no brainer.
I hope some old schoolers chime in.

What's wrong with M1 10w-30 EP?


For the sake of the discussion in this thread,
I would argue that M1 10w-30 EP is an outlier.
It is similar in viscosity to GTX,
and appears to not have highest quality base stock.

 

[hatt]

Originally Posted by Direct_Rejection
Originally Posted by hatt
Originally Posted by Direct_Rejection
Thank you.
Personally, I have always been big about base stocks.
M1 has all that PAO at Walmart prices...kind of a no brainer.
I hope some old schoolers chime in.

What's wrong with M1 10w-30 EP?


For the sake of the discussion in this thread,
I would argue that M1 10w-30 EP is an outlier.
It is similar in viscosity to GTX,
and appears to not have highest quality base stock.

It doesn't need the highest quality basestocks. Are you saying Mobil put the M1 EP label on a bad product?

 

[DirectRejection]

No, not at all. M1 EP 10w-30 is a fine product, based upon the certifications it has.

Clearly it is designed differently than M1 EP 0W20.

My original post was in an effort to be on topic.

Base stocks and additive packages are both crucial in designing increasingly thin oils.

Are these oils up to snuff, or should we just say what the heck and go for good old viscosity ?

 

[hatt]

When dealing with flagship oils I'm figuring the additive technology that thinner oils require carry over to thicker oils making them even better.

 

[ZeeOSix]

Originally Posted by Direct_Rejection
Are these oils up to snuff, or should we just say what the heck and go for good old viscosity ?


I'd like to see a test where the same exact additive package was used in various viscosity oils, and then compare the wear rates of certain engine components using the same engine under the same conditions - and also under different use scenarios, not just benign engine use conditions.. That would show the true viscosity effect on wear. Comparing different viscosity oils with different add packs skews the data.

 

[StevieC]

Originally Posted by ZeeOSix
Originally Posted by Direct_Rejection
Are these oils up to snuff, or should we just say what the heck and go for good old viscosity ?


I'd like to see a test where the same exact additive package was used in various viscosity oils, and then compare the wear rates of certain engine components using the same engine under the same conditions - and under different use scenarios, not just benign engine use conditions.. That would show the true viscosity effect on wear. Comparing different viscosity oils with different add packs skews the data.


In the Amsoil Signature series it's like that between the different weights and I do intend to try the 0w30 and maybe the 0w40 against the 0w20 I'm using now once the break-in is done and I have established a UOA trend on the 0w20 for comparison.