If anyone wants to lend me a can of 5W50 I'll happily run it in my engine just for long enough to do the test and report the results. It may not be quite as clean looking when it comes back, but I can't imagine it would materially affected. You're thinking like an engineer! :-) Buy some, run the test, drain it, then sell it with a signed certificate "Individually hand tested by Revilla". At a grossly inflated price. Jonathan PS: Please keep them coming.