10w40 oil Not ILSAC Approved?

[doolah02]

I noticed that most 10w40 motor oils are not ILSAC approved. Jus wanted to
Know the reason why?

 

[Quattro Pete]

10W-40 oils are not considered resource conserving. Only Xw-30 and lower grades can meet ILSAC requirements.

 

[doolah02]

Would that also be the reason it's not a Group 5 oil?

 

[Quattro Pete]

Originally Posted By: doolah02
Would that also be the reason it's not a Group 5 oil?

No. Oil base has nothing to do with it.

I'm sure you could find some 10w-40 oils out there that contain group V.

 

[doolah02]

Thanks I have a stash of Kendall high mileage 10w40. I'LL switch to something that's
Approved when use that oil.

 

[Garak]

At one time, the 10w-40 grade could have low enough HTHS to get some energy conserving blurb. That disappeared when SAE J300 HTHS requirements were tightened up.

 

[FCD]

Any 40,50 and 60 grade oil can't classify as an ILSAC energy conserving oil.

 

[4WD]

Suppose the 40's market might be inclined to want more ZDDP than ILSAC as well ...
Regardless, 10w40 has some romance to it - so agencies and OEM's must play a significant role in the limited options ...

 

[FCD]

If you were to make a fuel economy ortiented 10W40 with low HTHS you would run into the problem that 10W-40 was infamous in the 70s and 80s for and that was bad shearing problems.
I refuse to use a 10W-40 unless the HTHS is over 3.5.

 

[ARCOgraphite]

I suggest the OP go to Lubrizol and read about oil, ILSAC and additives for a week then come back.

Ed U Kate Yo Sef!

 

[doolah02]

Checked HTHS for Kendall High Mileage 10w40...3.9 so I guess I'm in good shape.

 

[doolah02]

Went to Lubrizol sight and read the entire article, kinda confusing but I
did get a good ED U KATE TION, thanks!

 

[Quattro Pete]

Originally Posted By: doolah02
Checked HTHS for Kendall High Mileage 10w40...3.9 so I guess I'm in good shape.

Good shape for what? Does your engine require such high HT/HS viscosity?

 

[doolah02]

I'm just a beginner when it comes to oil, just trying to learn all I can from guys like you, car51,4wd and lots of
other knowledgable people on this sight.

 

[Quattro Pete]

Based on your other threads, this is for your 2001 Ford 4.0, correct?

I'm no Ford expert, but I believe Ford was recommending just regular resource conserving 5w-30 oil back then. And that's what I'd be inclined to use in this engine, unless there is a specific problem that you are trying to address.

High HT/HS oil will rob your engine of power and fuel economy, although nothing major. If you already have it, use it.

 

[doolah02]

Thanks Quattro Pete I have a minor chain rattle at start up when it sits for a couple of
days. Just thought 10w40 might quiet them some. I have several quarts of Kendall synthetic blend
5w30 that is noisey. I was thinking of mixing them 50/50 but not sure that would be wise since
I have them why not use the for a couple of OCI's.

 

[Quattro Pete]

Originally Posted By: doolah02
Thanks Quattro Pete I have a minor chain rattle at start up when it sits for a couple of
days. Just thought 10w40 might quiet them some.

Have you tried it yet? Has it made a difference?

 

[doolah02]

No I haven't tried it yet but I will keep you up to date.

 

[doolah02]

I have noticed a slight improvement with 10w30 Castrol high mileage.

 

[fdcg27]

ILAC does not deal in approvals. Rather it sets standards that an oil can either meet or not. ILSAC standards are mainly about fuel economy so of course 10W-40 grades need not apply.
Any current 40 grade has HTHS of at least 3.5, so fuel economy is not an attribute of the grade.
For your engine?
Try a 10W-40 and see what happens.
You may be headed for the inevitable timing chain replacement with the engine you have.
The OHC 4.0 was never known as a great engine and the oil used may not help.