ZDDP in QS GB 10w40?

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I got a bunch of Quaker State GB "Advanced Durability" SN rated oil. I searched and searched and could not find a UOA on this. I guess its not popular in this weight. I was wondering if anyone happened to know what the zinc ppm is on this? I plan on running it in an oil burner with a roller cam but was wondering if it would be safe in an older but mild 350 with flat tappet.
 
I don't claim to be an expert but as far as I know SN rated oils are limited to 700-800 ppm of zinc. A lot of high ZDDP oils do not carry the SN label because of the zinc limit.
 
Im my searches people mention that w40 oils are not limited under SN like the w30's. The API marking doesn't say "energy conserving"
 
True, the 40 grades do not have the same limit under SN. That said being a very common PCMO I'd be extremely surprised if the 10w40 has any more ZDDP in it than the other grades. High ZDDP is just not a priority in common PCMO's.
 
I'd stick with an HDEO such as Rotella 15w40 in a flat tappet engine.
And even HDEO are way down on ZDDP level these days, around 1200 PPM or less which is what the average PCMO had not that long ago.

And no, its not because engines can't still benefit from a healthy dose ZDDP but rather to meet never ending EPA mandates which means totally political and unnecessary.
 
Zinc in engine oil is greatly misunderstood.

Go read 540ratblog if you want to see factual data and not old wives tales.

If you want alot of zinc in a modern oil get quaker state defy high mileage. great oil.

Zinc 1,074 ppm

her is a link to voa click here >> http://www.pqiamerica.com/June 2014/QSDEFY.htm

I am running it when it is on sale or trying to make an older engine better.

Wear.... think moly titanium and boron. especially moly.

I like pennzoil hm $17 at Wally-W. 5 qt.

I think castrol edge is proven to be the best by engineers far smarter than anyone reading this.
 
Originally Posted By: jarad248
Zinc in engine oil is greatly misunderstood.

Go read 540ratblog if you want to see factual data and not old wives tales.

If you want alot of zinc in a modern oil get quaker state defy high mileage. great oil.

Zinc 1,074 ppm

her is a link to voa click here >> http://www.pqiamerica.com/June 2014/QSDEFY.htm

I am running it when it is on sale or trying to make an older engine better.

Wear.... think moly titanium and boron. especially moly.

I like pennzoil hm $17 at Wally-W. 5 qt.

I think castrol edge is proven to be the best by engineers far smarter than anyone reading this.


This is not correct information. The oil tested was Defy when it was SL rated and it is now SN rated so it has reduced zinc level in almost all grades. Too much zinc can also be corrosive in an engine.
 
Don't be confused about anything I said. I don't advocate excessive zddp.

Quaker state high mileage does have added zinc. that was the only example I could get my hands on quickly.

so no I am not misleading anyone here.

click me to see qs hm sheet page

rat540blog uses sound methodology. he produces facts. opinions do not hold up against facts. opinions contrary to

the facts are worthless nonsense.

I like pennzoil hm and castrol edge and edge hm. quaker state ultimate durability may be the best oil out there.

you can overheat qs ud and it is still incredible protection. almost always better than anything I have seen.
 
This is for the other posters in this thread. not you
cool.gif


Don't be confused about anything I said. I don't advocate excessive zddp.

Quaker state high mileage does have added zinc. that was the only example I could get my hands on quickly.

so no I am not misleading anyone here.

click me to see qs hm sheet page

rat540blog uses sound methodology. he produces facts. opinions do not hold up against facts. opinions contrary to

the facts are worthless nonsense.

I like pennzoil hm and castrol edge and edge hm. quaker state ultimate durability may be the best oil out there.

you can overheat qs ud and it is still incredible protection. almost always better than anything I have seen.
 
Originally Posted By: jarad248
rat540blog uses sound methodology. he produces facts. opinions do not hold up against facts. opinions contrary to the facts are worthless nonsense.


That website and those "tests" have zero methodology. That's the worst possible aspect you could possibly pick to try and defend.

Whether other aspects may have limited relevance to an engine could be open to debate, but not that one.
 
Originally Posted By: jarad248


I like pennzoil hm and castrol edge and edge hm. quaker state ultimate durability may be the best oil out there.

you can overheat qs ud and it is still incredible protection. almost always better than anything I have seen.


Originally Posted By: jarad248
Koenigsegg's team concluded castrol edge is the best oil in the world.

see my other post on castrol. Ignore the naysayers...


Why is Koenigsegg not running QS then? You realize you contradict yourself everyday?
 
Originally Posted By: jarad248
This is for the other posters in this thread. not you
cool.gif


Don't be confused about anything I said. I don't advocate excessive zddp.

Quaker state high mileage does have added zinc. that was the only example I could get my hands on quickly.

so no I am not misleading anyone here.

click me to see qs hm sheet page

rat540blog uses sound methodology. he produces facts. opinions do not hold up against facts. opinions contrary to

the facts are worthless nonsense.

I like pennzoil hm and castrol edge and edge hm. quaker state ultimate durability may be the best oil out there.

you can overheat qs ud and it is still incredible protection. almost always better than anything I have seen.


Once again you are wrong and misleading. Does Defy use zinc? Yes it does use their "boosted zinc" (thats their zinc additive) but not at elevated levels anymore. Defy use to be an SL rated oil with boosted zinc, however, about a year ago they switched over to the SN rating, which, means it no longer has the elevated zinc levels. Big difference between boosted zinc and boosted zinc LEVELS. That's called marketing. You CANNOT have elevated zinc levels AND meet the SN rating that it has.

Also, you must not know there are different types of moly. 250ppm moly does not mean it is better than 50ppm of trinuclear moly, which, most of the advanced oils are using.

You can overheat many synthetic oils and still get good results, that statement you are advocating is called MARKETING. You do realize that Quaker State is a low top tier oil owned by Shell, whos premium oil line is, Pennzoil.

RATROD is interesting but he doesn't know more that tribologist who formulate the oils.
 
qs hm says it has more zinc than normal. Who am I to argue? I am sure they do..

qs ud has alot of moly more importantly it has one of the highest score anyone has ever seen as tested by 540rat.

Again who am I to argue.

So You are just lousy at trying to pick this thread apart.

I doubt if any big player uses anything but trinuclear moly.

Why don't you do something different today and try to be friendly..
cool.gif
 
Originally Posted By: jarad248
qs hm says it has more zinc than normal. Who am I to argue? I am sure they do..

qs ud has alot of moly more importantly it has one of the highest score anyone has ever seen as tested by 540rat.

Again who am I to argue.

So You are just lousy at trying to pick this thread apart.

I doubt if any big player uses anything but trinuclear moly.

Why don't you do something different today and try to be friendly..
cool.gif



Please show where it says QS Defy currently has higher levels of zinc than allowed by SN? Oh, that's right, it doesn't. You apparently can not comprehend anything other than your opinion and an outdated experiment that is not relevant anymore. QS HM did use to have over 1000ppm of Zinc but once again, it went SN and dropped down into the normal range just like any other SN rated oil. If fact, many companies do utilize different types of moly based on price point of the oil they're trying to acheive.

There's nothing unfriendly about these posts. Just pointing out your flawed opinions based on outdated information.
 
Originally Posted By: CrAlt
I got a bunch of Quaker State GB "Advanced Durability" SN rated oil. I searched and searched and could not find a UOA on this. I guess its not popular in this weight. I was wondering if anyone happened to know what the zinc ppm is on this? I plan on running it in an oil burner with a roller cam but was wondering if it would be safe in an older but mild 350 with flat tappet.


OP, not the exact VOA your are looking for, but here are two VOA from PQIA.
First QSGB 5W30, and second GTX 10W40, both have the same zinc levels at ~ 850 ppm

http://www.pqiadata.org/QuakerState5W30.html
http://www.pqiadata.org/CastrolGTX10W40.html

I would suggest that QSGB 10W40 would the same 850 ppm level.
 
Originally Posted By: jarad248
rat540blog uses sound methodology. he produces facts. opinions do not hold up against facts. opinions contrary to

the facts are worthless nonsense.

How can I check his facts? Science requires repeatability and reproducibility, of which he offers neither.
 
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