...any words of wisdom from UOA veterans aside from the Blackstone packaging instructions?
Danh said:Using a major brand lubricant meeting the required specifications for the engine will never yield useful information from a UOA in regards to engine longevity. The only times I've ever gotten a UOA is to test for suspected coolant or fuel contamination. But with what I've seen from Blackstone lately I'm giving up on the ability for a $30 UOA to detect fuel. And as far as "dirt" goes, I don't even know what part of the UOA shows that.
There are major issues with blanket statements like this. First off, if a UOA from ANY company shows unusually high iron, silicon, potassium, wear metals, etc., there are mechanical reasons[/b] for it. For example, I've read of a city bus (I forgot where) that started doing UOA in attempts to prolong the OCI (Oil change intervals). The first UOA came back with Iron ppm in the thousands with relatively few miles on the oil. Mechanical investigation revealed a loose rocker arm bolt. The rocker arm was replaced, the bolt was tightened, the oil changed, and appropriate gaskets replaced; and the next UOA came back normal. How is this NOT adding greatly to engine longevity? Who can say with certainty that the loose bolt may not have led to valve train failure followed by shrapnel within the engine's moving parts while running and in a matter of seconds you have a pile of scrap metal? If you read "tales from the oily side" on Blackstone's website, there are numerous stories of such instances. http://www.blackstone-labs.com/tales-from-the-oily-side.php
I have personally saved two engines that had UOA come back with high potassium (antifreeze) in the oil. There isn't a mechanic in the nation who can look at a dipstick and tell you what you will learn from a UOA.
Secondly, I always pay extra and obtain particle counts with the UOA. This WILL tell you how "dirty" the oil is. It won't tell you what the particles are, but it does show overall contamination in the oil. And since oil itself does not wear out, contamination itself is one of the limiting factors as to why we change oil to begin with.
If you think a particle count doesn't matter, take a few minutes to read this: http://lifetime-reliability.com/store/ma...Cleanliness.pdf
Finally, regarding sending in your oil samples to Blackstone, you can ask them for free on their website sampling kits that come with sample bottles, a data sheet to fill out for pertinent info, and a shipping over container. I NEVER use the post office to ship anything like these. The postal service is s-l-o-w, totally irresponsible, unreliable, ignorant and fearful of what they don't know, etc. If you don't mind waiting two weeks for your sample to get to the lab, by all means, save the price of two Happy meals and use USPS. I spend the $9.81 and use UPS. They give you a tracking number, overnight delivery, proof of delivery, etc.
Good Luck!!