Abnormal data for xW30 from Mobil website for M1

[HTSS_TR]

Below are current data from Mobil website for Mobil 1 0W30, 5W30 and 10W30.
5W30 is thinnest at starting temp and thickest at operating temp, and have highest VI. If the data sheets are correct then Mobil 1 10W30 is to avoid, and 5W30 is the best of Mobil 1 in the 30 weight.

What do you think ?

0W30:Visc@100ºC: 10.9, Visc@40ºC: 62.9, VI: 166, HTHS: 3.0

5W30:Visc@100ºC: 11.0, Visc@40ºC: 61.7, VI: 172, HTHS: 3.1

10W30:Visc@100ºC: 10.1, Visc@40ºC: 63.2, VI: 146, HTHS: 3.0

 

[147_Grain]

Originally Posted By: HTSS_TR
5W30 is the best of Mobil 1 in the 30 weight.



+1

The 0w30 is only better than the 5w30 at temps well below 0*F.

 

[901Memphis]

Too bad there's no cold crank specs.

 

[AP9]

Interesting. What about the low-temp specs, such as pumpability and pour point I wonder? I don't understand how the 0W30 could have lower VI than 5W30.

 

[TTK]

Makes me wonder how well we understand such things. Mobil lists the 0w30 as having greater high temp protection than 5w30.

 

[KCJeep]

I bet the 0w30 has better base stocks, a lower pour point and fewer VII's. While the 5w30 would probably serve most drivers needs better, the 0w30 is probably the highest quality oil.

 

[Astro14]

What's abnormal? That the 0W30 has higher viscosity at high temps? Higher HTHS? I noticed that a while ago while surfing a few oil specs...

This just proves that a 10W30 is NOT necessarily "thicker" than 0W30...which we all knew...didn't we?

 

[supercity]

I don't see a problem of Mobil 1 10w30 vs Mobil 1 5w30. The figures look typical. The 0w30 numbers are not so typical compared to 5w30 though as it has a lower KV100 and a lower VI. It shows how viscosity is not the be all and end all.

 

[Quattro Pete]

Originally Posted By: HTSS_TR
5W30 is thinnest at starting temp

That would depend on what the starting temp is. If you're starting somewhere in Alaska in the winter, the 0w30 might be thinner.

 

[buster]

Originally Posted By: KCJeep
I bet the 0w30 has better base stocks, a lower pour point and fewer VII's. While the 5w30 would probably serve most drivers needs better, the 0w30 is probably the highest quality oil.


I think that's right. The high temp performance is better for both Mobil 1 Advanced Fuel Economy oils. Per Mobil's check rating system.

 

[Cujet]

Interesting.

In the past, Mobil 1 10w30 provided significantly better UOA results than the 5w30.

I suspect the oil formulation has changed significantly. Mobil 1 10w30 VI of only 146? Yuk. I could have sworn that in the past it was 169 or so...

 

[HerrStig]

Originally Posted By: Astro14
What's abnormal? That the 0W30 has higher viscosity at high temps? Higher HTHS? I noticed that a while ago while surfing a few oil specs...

This just proves that a 10W30 is NOT necessarily "thicker" than 0W30...which we all knew...didn't we?
+1

 

[CATERHAM]

Originally Posted By: HTSS_TR
Below are current data from Mobil website for Mobil 1 0W30, 5W30 and 10W30.
5W30 is thinnest at starting temp and thickest at operating temp, and have highest VI. If the data sheets are correct then Mobil 1 10W30 is to avoid, and 5W30 is the best of Mobil 1 in the 30 weight.

What do you think ?

0W30:Visc@100ºC: 10.9, Visc@40ºC: 62.9, VI: 166, HTHS: 3.0

5W30:Visc@100ºC: 11.0, Visc@40ºC: 61.7, VI: 172, HTHS: 3.1

10W30:Visc@100ºC: 10.1, Visc@40ºC: 63.2, VI: 146, HTHS: 3.0

This has been discussed many times before.
The KV spec's between the three grades say more about an oils chemistry. The low KV100 10.1cSt for the 10w30 because is uses heavier base oils and little in the way of polymer VIIs.
Operational viscosity correlates with HTHSV so all these oils likely have very similar viscosities at operating temp's with the 10w30 likely a bit heavier due to it's low VI.

The other thing, don't take these PDS spec's too seriously, they are just approximate figures. Heck, the 0w30 many forget used to have a VI of 180 and Mobil has no explanation why it's only 166 now that they're willing to tell.

 

[troyb43]

The 10w30 is almost an SAE 30 in my opinion, looks alright to me though for most climates of the South in the Winter months

 

[Danh]

The VI (IIRC) is a product of a simple calculation of the viscosity at 100c vs 40c. While this is useful information it doesn't really tells how the oil will perform at colder temperatures.

An oil that performs a certain way between 100c and 40c will not necessarily perform the same way between 40c and -20c. So I wouldn't assume that an Mobil 1 5w30 is thinner at winter starting temps than Mobil 1 0w30.

 

[OVERKILL]

Originally Posted By: Danh
The VI (IIRC) is a product of a simple calculation of the viscosity at 100c vs 40c. While this is useful information it doesn't really tells how the oil will perform at colder temperatures.

An oil that performs a certain way between 100c and 40c will not necessarily perform the same way between 40c and -20c. So I wouldn't assume that an Mobil 1 5w30 is thinner at winter starting temps than Mobil 1 0w30.


Don't be talking down about VI around here you heretic! You're likely to get hung for comments like that!

*cue the VI posse

 

[randomhero439]

The Mobil 1 0w30 and Pennzoil Platinum 0w-20 seem to put more emphisis on actually CCS/MRV numbers instead of viscosity index. I believe this comes from using higher quality "true synthetic" base stocks instead of VII to get the 0w rating. Heck, the Platinum 0w-20 is thicker than the 5w-20, AND has lower NOACK!

 

[Shannow]

 

[HTSS_TR]

Originally Posted By: Quattro Pete
Originally Posted By: HTSS_TR
5W30 is thinnest at starting temp

That would depend on what the starting temp is. If you're starting somewhere in Alaska in the winter, the 0w30 might be thinner.

We have no winter in So Cal

The coldest I encountered here the last 20-25 years was around 34-35F for a day or 2.

 

[Garak]

Originally Posted By: Danh
So I wouldn't assume that an Mobil 1 5w30 is thinner at winter starting temps than Mobil 1 0w30.

Absolutely. That is, after all, why it's a 0w-XX grade. It's going to perform better in the MRV and CC tests at the appropriate temperatures.

It might not matter in a Texas winter, but in North Dakota, things might be different.