Thinnest Shear Stable xw-30 oil?

[dx92beater]

I remember how Quaker State touted their claims of a slight horsepower advantage when using their QS Horsepower and then the marketing went away when it became QS Ultimate Durability.

Under the same philosophy, I'd like to know of some xw-30 oils that are the thinnest @30w but that are resistant to sheer. Is QS Ultimate Durability the best option?

I was reading that Mobil 1 0w-30 AFE might be the best option.

Any ideas?

Thanks

 

[Speak2Mountain]

Some ppl may have a cow, but this

 

[SZR48207]

If knowledge from the motorcycle world can be applied here, then you would actually want a dino oil to resist shear. And you'd want a small "delta" between the multi-vis numbers (10W-30 would shear less than 0W-30).l

 

[Quattro Pete]

Originally Posted By: Speak2Mountain
Some ppl may have a cow, but this

I would imagine their 10w-30 would be even more shear stable.

 

[CT8]

Why the thinnest ?

 

[Linctex]

Originally Posted By: dx92beater
...claims of a slight horsepower advantage ...Under the same philosophy, I'd like to know of some xw-30 oils that are the thinnest..


looks like he's looking for that last .0001 HP available

 

[dx92beater]

Originally Posted By: Speak2Mountain
Some ppl may have a cow, but this


Wahaaaa...I wish I was willing to put in that kind of money. No cow though.

 

[dx92beater]

Originally Posted By: Linctex
Originally Posted By: dx92beater
...claims of a slight horsepower advantage ...Under the same philosophy, I'd like to know of some xw-30 oils that are the thinnest..


looks like he's looking for that last .0001 HP available


....and that is the bottom line....maybe .001, maybe .01, maybe .1....but more than likely 1 or more.

It's just a hobby. As far as the rest of the posts I concur, but Dino probably isn't an option for that reason.

Wouldn't I generally be looking for the lowest cSt for starters and then take it from there as far as shear?

 

[TheKracken]

Would you consider a slightly thicker 0/5w20 or are you bound by warranty?

 

[2004tdigls]

https://cglapps.chevron.com/msdspds/PDSDetailPage.aspx?docDataId=77115&docFormat=PDF

but its only rated api cg/cf

but!, check out the over 1100 ppm of zinc and phosphorus

 

[slacktide_bitog]

Given what you're looking for, I'd go with M1 0w30

 

[Garak]

Originally Posted By: 2004tdigls
but its only rated api cg/cf

It might not be very thin at operating temperatures, though.

 

[2004tdigls]

at 100C it is 10.3 Cst, which is only a little bit thicker than a 20W

 

[Garak]

What's it's HTHS, though? These examples have typically had higher HTHS.

 

[SR5]

Regular M1 10W30 KV100 = 10.1 cSt, yet being a 10W30 rather than a 0W or 5W30 it uses less VII and is more shear stable.

For comparison
Regular M1 5W30, KV100 = 11.0 cSt
PP 5W30 and PP10W30, both have KV100 = 10.3 cSt

The PP xW30 is my second choice, as it's always on the thin end of the viscosity grade, and looks fairly shear stable in the UOA's I have seen.

 

[SR5]

Originally Posted By: Speak2Mountain
Some ppl may have a cow, but this

RedLine 0W30, KV100 = 11.7 cSt and HTHS = 3.2 cP, (nice Noack = 9% BTW)
That looks like a good oil, but definitely not the thinnest 30 grade around.

The regular M1 10W30 has a KV100 = 10.1 cSt and HTHS = 3.0 cP, so much thinner.

 

[2004tdigls]

good point, I dont know

 

[dx92beater]

Regular old M1 or AFE? The vehicle is the EJ257 Turbo Forester XT. Everyone loves Rotella T6 5w-40 but that has to be cutting down HP quite a bit. Searching around, some guy reported an 11HP difference between RT6 and an x-w30. The vehicle is driven like an old person would drive it most of the time.

Some guy got here had a real nice UOA with M1 0w-30 AFE on this engine/trim as well. I think that regular M1 has a bad rep on these engines.

Check it out...

https://www.bobistheoilguy.com/forums/ubbthreads.php?ubb=showflat&Number=2240969

Just curious and again having a good time. Thanks for the posts so far.

 

[SR5]

Originally Posted By: dx92beater
Regular old M1 or AFE?


Look at the M1 web page. You want the lowest KV100 kinematic viscosity for the highest a HTHS dynamic viscosity. This reflects the lowest polymer VII load and the highest shear stability.

Regular M1 5W30, KV100 = 11.0 cSt, HTHS = 3.1 cP
Regular M1 10W30, KV100 = 10.1 cSt, HTHS = 3.0 cP
M1 0W30 AFE, KV100 = 10.9 cSt, HTHS = 3.0 cP

My first pick would be regular M1 10W30.
Sorry the AFE just doesn't do it for me.

 

[dx92beater]

Originally Posted By: SR5
Originally Posted By: dx92beater
Regular old M1 or AFE?


Look at the M1 web page. You want the lowest KV100 kinematic viscosity for the highest a HTHS dynamic viscosity. This reflects the lowest polymer VII load and the highest shear stability.

Regular M1 5W30, KV100 = 11.0 cSt, HTHS = 3.1 cP
Regular M1 10W30, KV100 = 10.1 cSt, HTHS = 3.0 cP
M1 0W30 AFE, KV100 = 10.9 cSt, HTHS = 3.0 cP

My first pick would be regular M1 10W30.
Sorry the AFE just doesn't do it for me.


Yep, I did. Thanks for picking this apart for me. I have walked away with something new.