stoopid
1000 Posts Club!
This is certainly an issue, but with data in hand the results can at least be scrutinized. Without that data though (ie - not doing any testing), it's a bit of guess work. The biggest benefit for testing is usually in determining if detergent concentrations are lower, what foreign matter is accumulating, and in what concentration the components that stabilize the oil (providing its viscosity) are fairing. The gathering of data can never be 'wrong', but yes how someone uses that data is another story.On one hand, I like the desire to be objective. On the other hand, what standard are you testing to?
Let me give a counterpoint: There are other industries that have created testing regimes under the pretense of helping people objectively determine the need for something. The problem is that while the tests may give objective data, the standards against which the data is interpreted are superstitious or counterfactual. "Oh, your test says 6. Well, we recommend that anyone testing below 8 does X." Yet they never have an objective basis to justify why they set the bar at 8 or why 6 is in any way problematic. This is just a ruse to sell you X.
The two situations oil testing is most useful is in extending the oil changes (avoiding the tossing of 'good', still functional oil) and to verify the engine isn't eating itself from the inside (levels of metal being found).
Blackstone, who was referenced a few posts up, have a fairly respected testing history and provide charts with the raw data as well as 'expected' ranges for what was found. It's a starting point, more than if you had no data at all.
I'll stop posting as we await the details for the inquiry on our current standards.
Disclaimer: I am not a chemist or car mechanic, and have never personally sent in oil for testing. I change my oil at reasonable intervals, usually very close to or within manufacturer guidelines.


