Interesting idea! But, playing
for a minute, I can see some potential issues.
You're assuming that there is a 'telltale' of an oncoming failure in the oil, not sure that's a fair assumption. IMS failure seems to be a sudden, not progressive, failure and so may not offer such a 'telltale'. Confirming that no 'telltale' exists could end up being the only 'result' from such a database, which is basically where we are now.
Also, an oil analysis is a snapshot at a given time/mileage (since the last change). You'd need to build a database using the same oil, filter, mileage, usage (driving style), or multiple analyses and you'd have to have a fairly significant sampling to draw any certain conclusions.
Most owners go 7500-10k mi. between oil changes (ie. samples). For some, that can mean a year or more. You could have a 'clean' sample and still have an unexpected failure before the next sampling making the whole process meaningless for you personally. Also, perrenially adding $30 to an already expensive oil service isn't too appealing.
Suppose your sample did set off the Red Light, or was 'marginal'... what are you gonna do about it? There is little service being done to these engines, even Jake Raby's operation is geared more toward replacement (albeit with a 'better' motor) and not repair. I suppose you could do an overhaul, but that's likely to be nearly as expensive as just letting the motor fail and addressing it then, using money that would have otherwise gone into analyses, especially since there are numerous special tools (some unavailable) required for engine assembly adding to the cost for a DIYer.
What if such a database became common knowledge? How would that impact an owner trying to sell his car? Would there be a legal impact if the buyer suddenly had a failure?
To me it's kinda like knowing the hour of your own death - still unavoidable, but you get to spend endless sleepless nights worrying about it.
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