Mobil AFE 0w30 4832 Miles - Jeep Renegade 1.3T

[kschachn]

Gary Allen used to claim that M1 0W-40 was designed to shear down to a 30-weight in use; so it was really a 0W-30 in practice.
Now we are saying the same thing about AFE 0W-30?

I wonder which license or approval the oil has that's designed to mechanically shear as part of the specification? I've read most of the Afton Specification Handbook, I have yet to see one that lists "designed" shear as part of the specifications.

This is by all accounts fuel dilution, not shear. Which is nearly all what's called "shear" on this board.

 

[buster]

fuel is the issue nine times of ten and oils that contain more VII's tend to lose viscosity more so than those that don't

 

[RDY4WAR]

I wonder which license or approval the oil has that's designed to mechanically shear as part of the specification? I've read most of the Afton Specification Handbook, I have yet to see one that lists "designed" shear as part of the specifications.

This is by all accounts fuel dilution, not shear. Which is nearly all what's called "shear" on this board.

I have a theory that it's more for the guys who use a 30 grade but want more from the oil outside of the API restrictions. So they make a 0W-40 that's just barely a 40 grade, knowing it'll shear to a 30 grade, but it contains more ZDDP to get around API along with a good slug of AN. I feel like it's a good "all-around" oil, at least as far as common shelf oils are concerned.

 

[OVERKILL]

I have a theory that it's more for the guys who use a 30 grade but want more from the oil outside of the API restrictions. So they make a 0W-40 that's just barely a 40 grade, knowing it'll shear to a 30 grade, but it contains more ZDDP to get around API along with a good slug of AN. I feel like it's a good "all-around" oil, at least as far as common shelf oils are concerned.

That was/is the case for most of the Euro 0W-40's, they are all on the bottom of the xW-40 range. Recall that a lot of the approvals also apply to 5w-30/0w-30's, which were historically near the top of the viscosity range. The >3.5cP HTHS requirement is the reason.

So, it doesn't take much fuel to push the oil into the upper range of an xW-30.

 

[kschachn]

That was/is the case for most of the Euro 0W-40's, they are all on the bottom of the xW-40 range. Recall that a a lot of the approvals also apply to 5w-30/0w-30's, which were historically near the top of the viscosity range. The >3.5cP HTHS requirement is the reason.

So, it doesn't take much fuel to push the oil into the upper range of an xW-30.

Yes the approval is based on a minimum HT/HS, not the less descriptive (and less important) grade.

 

[edyvw]

Yes, that was one of the reasons, along with the high HTHS and sticking with the factory recommended grade of 0W30. Anything else I can do to prevent LSPI?

IDK what programming that transmission has, but do not drive in any Eco mode if it has.