Quote:
Originally Posted by patrickt
But I will tell you from my experience in discussing these matters with other engine nuts who send their oil in for analysis, the results of these tests are notoriously wrong. Identical samples sometimes come back with vastly different numbers.  Mostly, I like to see a reasonable zinc & phos number, and no water or antifreeze in the oil. Other than that, I take everything it says with a grain of salt. |
Just curious, how you can say the results are wrong, but then rely on the
zinc/phosphorus numbers and the absence of coolant? FWIW, I have used Blackstone for analysis of my expedition Toyota Land Cruisers (I've had 11 of them in 20 years) and found their data to be extremely consistent and reliable. Like you, I have relied it mostly for detecting water/coolant, as these trucks are prone to HG failure after 150k miles.