Austalian mag oil comparison article...your $.02?

[30vVT]

http://www.animegame.com/cars/Oil Tests.pdf

What flaws are there with this study? A resident triboligist claims this study doesn't mean anything due to a lack of "engine sequences".

Are Royal Purple and Valvoline are now the new BITOG darlings?

Sorry if this is a repost.

 

[nooil]

Been trying to tell folks here that all you need is Valvoline !

 

[badtlc]

Royal Purple and Valvoline have always been great oils. It is their price point that make them not so popular on BITOG.

 

[90crvtec]

Alright, I don't post here much at all but this particularly caught my interest.

The biggest glaring inconsistency for me would be that all these oils were tested at room temperature. So then, what is the point? I think that's part of why we see M1 0w40 produce a large wear scar in this test.

For a more accurate comparison I think the oil should be at least pre-heated to 100C and then the test should be performed. This allows for any additives or other properties of the base oils to "activate" when they are at their operating temperatures for which the oils are designed.

Finally, this test is such a limited test as I'm not sure any conclusions can be made about the products that were tested. In a properly operating engine I'm struggling to think of why only a thin film would be left on the surfaces of moving parts for extended periods of time. A healthy engine with a full sump is going to have at least adequate oil pressure and flow, thus negating a lot of the results that were achieved in this test. What I'm trying to say is, if you're making your oil choice based on film strength alone then you already have problems that no oil can fix.

All of this is just IMHO of course.

 

[buster]

That test has very little relevancy to actual engine/oil performance. Very misleading IMO.

 

[JAG]

Agree with above two posts. I think the results apply to a lubrication regime not representative of engine parts of most engines. I wish a company would make a valvetrain machine that gets heated oil supplied to the parts like it does in engines. The valvetrain should be a particularly harsh type (flat tappet with pretty stiff springs). Run it for many hours (have to find how long is good through testing many oils) and then measure wear of all parts. That would be cheaper and more convenient than running an entire engine.

 

[Curious Kid]

Interesting to mull over, even though it doesn't have any direct correlation to overall engine conditions as others have mentioned - Though I now ponder points like piston ring to cylinder wall an perhaps valvetrain mating faces where it's likely the fluid film is breached.

The point of sample oil temperature is an interesting one, as the arguement about additive activation has been discussed around here from time to time. I would think though, that at the point of contact between the two surfaces where abrasion is occurring, such hot spots would generate ample heat to cause activation.?. One could counter by saying that rapid heat transfer and continous flushing of the small amount of oil from the contact zone, as well as the fact that the oil sample is fresh rather than "aged" to provide what has been argued as another means of additive readiness through some sort of oxidation/conversion.?.

Demonstrations still are interesting, none-the-less.

Thanks for sharing.

 

[Pablo]

Some form of this has been posted before, but I'm not sure if it was this one or not. When was this "testing" done?

My anecdotal comments:

I have a couple closely linked friends named BO and GUS

I think they have another short friend who they have nicknamed STUNT. Which oil is a major advertiser in the mag? The Aussie oil?

“Pulls out all the stops…..” ????? A singular test on questionable method? This type of test is very similar to 4-ball and it’s the kind of thing I give Bob heck for.

 

[nascarnation]

they forgot the part where they add the ZMax and it runs forever without seizing up..........

 

[MKR]

LoL, you guys just don't wanna admit that royal purple is that good.

I was impressed, its just a synthetic oil, not some additive that performs well in only one kind of test.
As for warming the oil...... what about cold starts. I would like a oil that works well warm or cold.

 

[Trex101]

Hey, I have seen this article before in BITOG. The StreetCommodores editor has admitted that the test is flawed & not representative of actual engine condition in one of their articles.

 

[Z_ombie]

RP will give you exceptional cold start polishing

 

[badtlc]

Quote:

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Hey, I have seen this article before in BITOG. The StreetCommodores editor has admitted that the test is flawed & not representative of actual engine condition in one of their articles.

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No, it is not a perfect test of a real world engine. BUT, this test does show there are some differences between oils. Regardless of real world engine tests, this test did show that certain oils handled this situation better than others.

 

[Pablo]

Quote:

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No, it is not a perfect test of a real world engine. BUT, this test does show there are some differences between oils. Regardless of real world engine tests, this test did show that certain oils handled this situation better than others.

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Actually that is an incorrect assumption. Let me put in rhetorical question form: How do you know this test is repeatable?

 

[badtlc]

Quote:

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Quote:

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No, it is not a perfect test of a real world engine. BUT, this test does show there are some differences between oils. Regardless of real world engine tests, this test did show that certain oils handled this situation better than others.

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Actually that is an incorrect assumption. Let me put in rhetorical question form: How do you know this test is repeatable?

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How do you know it isnt?

 

[Big O Dave]

I believe it, because it's in print... it HAS to be true. I'm gonna pour out all of my GC and Delo Syn 0W-30, and replace it with RP.

Phew! I'm glad I found this magazine article before I destroyed all of my engines!

 

[JAG]

They didn't provide any repeatability data so no assumptions can be made about it. Can't assume it is repeatable and can't assume it isn't. That renders the results quite impotent and makes them more entertainment than providing solid data. It would have been not much more work to do repeatability tests.

 

[obbop]

Those in the crowd sporting pocket protectors and a slew of writing implements ensconced within prefer the term "replicability."

/runs back to the oracle.... dictionary... that thing with all the words in it.

 

[PT1]

Quote:

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Agree with above two posts. I think the results apply to a lubrication regime not representative of engine parts of most engines. I wish a company would make a valvetrain machine that gets heated oil supplied to the parts like it does in engines. The valvetrain should be a particularly harsh type (flat tappet with pretty stiff springs). Run it for many hours (have to find how long is good through testing many oils) and then measure wear of all parts. That would be cheaper and more convenient than running an entire engine.

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Nobody would accept the results. I have a customer in that business. Every OEM wants data from their own engines run many million cycles so there is no question about the statistical reliability.

 

[eshishlo]

I think that there is something very interesting about this group of oils. You might notice that the 10w-40 RP and Racing RP which is about 20w-50 did much better compared to Mobil 0w-40.
Also, how would the oils hold up after 5,000 miles in an engine. Now that would be a great test. Or ever 1,000 miles...