M1 High Mileage syn / IlSAC GF3

[mvg72]

I've been reading about the various categorise and realize that the Ilsac GF4 is the current standard with reduced phosperus to help with emissions and estend the life calalytic converters..

I recently found M1's new HM syn oul and it IlSAC GF3... What is the difference there? Is there a higher phosperus level.
Or maybe should ask...what is the difference?

 

[mvg72]

I just asnwered my own questin in regard to the level of phos: used the search function and found an M1 HM VOA... seems it has 921 ph. that's 121 points higher than the GF4 standard. I mean, this is a full syn, so I'm assuming it's going to perform better than any 5w 30 conventional...but will it cause any degredation to the emissions system?

 

[Merkava_4]

Quote:
but will it cause any degredation to the emissions system?


I doubt it; and besides that, it's not a diesel oil anyway.

 

[mvg72]

Found this:

Sulfur and phosphorous from the oil enter the engine
through the PCV system. The more volatile components
in the oil vaporize and carry these contaminants into
the intake manifold. Most of this happens during the
first 300-500 miles after each oil change, since most
volatile components vaporize from the oil within that
first 500 miles.


For those of you who change your oil too often. Anway.... I'm still wondering if trying the Ilsac GF3 rated M1 HM will effect the cat.

 

[mvg72]

Originally Posted By: mvg72
Found this:

Sulfur and phosphorous from the oil enter the engine
through the PCV system. The more volatile components
in the oil vaporize and carry these contaminants into
the intake manifold. Most of this happens during the
first 300-500 miles after each oil change, since most
volatile components vaporize from the oil within that
first 500 miles.


For those of you who change your oil too often. Anway.... I'm still wondering if trying the Ilsac GF3 rated M1 HM will effect the cat.


Guess I'll be the first to ask, but anyone have any insight to this? LOL

 

[TallPaul]

Originally Posted By: mvg72
Found this:

Sulfur and phosphorous from the oil enter the engine
through the PCV system. The more volatile components
in the oil vaporize and carry these contaminants into
the intake manifold. Most of this happens during the
first 300-500 miles after each oil change, since most
volatile components vaporize from the oil within that
first 500 miles.


I would hope that a quality motor oil would not do this. I am wondering why an oil company would blend an oil that they know will change in 500 miles?

 

[mvg72]

Originally Posted By: TallPaul
Originally Posted By: mvg72
Found this:

Sulfur and phosphorous from the oil enter the engine
through the PCV system. The more volatile components
in the oil vaporize and carry these contaminants into
the intake manifold. Most of this happens during the
first 300-500 miles after each oil change, since most
volatile components vaporize from the oil within that
first 500 miles.


I would hope that a quality motor oil would not do this. I am wondering why an oil company would blend an oil that they know will change in 500 miles?


Agreed, but then, what would the purpouse be of moving from GF3 to GF4 rating? It was done to protect and help emission systems perform better. So, with that being said, M1 HM is GF3 and from what others are saying, it really wont hard any vehicles cat. But, you still have to wonder.

 

[TallPaul]

I always heard that the cat poisoning was not really an issue unless your vehicle consumed oil, but never thought about the volatility thing in combo with the PCV system. But who knows? I sure don't.

If you have to go through emissions testing then you want to be on the safe side I guess. If no testing maybe doesn't matter. I have no testing in my area.

But somehow I think the difference of 150 or so in phosphorus (that is the cat poision right) is not going to kill the cat that quickly. Maybe they did tests and found the SM levels would not kill the cat in 150,000 miles (assume is the current EPA mandated cat warranty life), whereas the SL maybe would not kill it in 110,000 miles or something like that.

 

[mvg72]

Tallpaul,
You make a good point, and this topic may just be "splitting hairs". Case closed.

 

[oilmaven]

I've been running the M1 HM since completing an Auto RX cleaning in my '97 Town & Country with the 3.8L. The engine uses no oil @ 116,000 miles (but has a slight persistent knock that doesn't seem to be bothering anything...ain't gonna worry about it). The oil looks black @ 2,000 miles on this oil...was planning on running it out to 5,000 miles. I really like the specs. on this oil. Any ideas if this stuff is good for 5,000 OCI in a Michigan winter or should I get it out of there sooner?

 

[buster]

Originally Posted By: oilmaven
I've been running the M1 HM since completing an Auto RX cleaning in my '97 Town & Country with the 3.8L. The engine uses no oil @ 116,000 miles (but has a slight persistent knock that doesn't seem to be bothering anything...ain't gonna worry about it). The oil looks black @ 2,000 miles on this oil...was planning on running it out to 5,000 miles. I really like the specs. on this oil. Any ideas if this stuff is good for 5,000 OCI in a Michigan winter or should I get it out of there sooner?


It's probably good for 1yr/15k miles most likely. They won't tell you that but M1 has always been field tested for long drains. M1 HM is a very robust oil.

 

[98LSC32V]

If your engine has a mechanical problem no way for 15,000 miles.