Oil Testing.

[Ralph Wiggum]

Managed to download it OK after a couple of attempts.

What they've done is measure film strength of cold oil.  What relevance this has to oil performance in an engine, I'm not sure.

The interesting thing for me is that the semi-synthetics generally do better than the full synthetics.  Is this because dino oil has better film strength, or is it the additive package?

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Good point but as they mentioned in the article they are using then Timken machine which is recognized as the industry standard for oil testing.

What other test methods would you recommend?

Edited 17/12/06 02:06 AM by hiddeous

[Kimberley Scott]

Run it in an engine for twenty odd hours then use the Timken test.

Scotty

[xr6]

Managed to download it OK after a couple of attempts.

What they've done is measure film strength of cold oil.  What relevance this has to oil performance in an engine, I'm not sure.

The interesting thing for me is that the semi-synthetics generally do better than the full synthetics.  Is this because dino oil has better film strength, or is it the additive package?

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Good point but as they mentioned in the article they are using then Timken machine which is recognized as the industry standard for oil testing.

What other test methods would you recommend?

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The Timken test is designed to measure the performance of EP (extreme pressure) lubricants (oils and greases). As car engine oils aren't EP lubricants, it's doubtful that this test tells us very much about their relative performance as car engine oils.

EP lubricants (stop laughing) are used in places like wheel bearings and CV joints, where there are small areas of very high pressure contact.

There's a fair bit of info on the Interweb on Timken test.

[tmac450]

I've seen similar tests ran in a workshop, with the same results, Royal Purple is king.

In fact, in one test I saw, Royal P even out performed other synthetics with aditives, and as stated in this test, even without the oil bath, the RP perfromes better.

There was a case in the US where a 4WD running RP holed it's sump and still ran (without further damage) on the coatings stuck to the components.

I've used the stuff for years and although it is dearer per litre, it more than makes up for it in longevity.  I can generally run RP for twice as long and it still comes put looking as fresh as it went in.

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you're full of sh#* how can the oil be as fresh as it first went in,and twice the change interval

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Fark, It's a figure of speach. I didn't say it was as fresh as it went in, I said looked. Just give it a go and see for yourself.