I use CAT for my engines and Blackstone for my generator, transmission, and my outboards.
Here's an example of the type of communication that I got this morning from Blackstone:
"This is an amended report to correct sample details. It's only the second oil change for this generator,
so it's not abnormal to find a high silicon level. That's from assembly sealers and lubes needed to put the
engine together, and you can expect a decrease at the next oil change. Metals already match up well with
averages for the engine type, so oil-sharing parts are maturing well. The viscosity, though a bit low, isn't a
concern. Fuel dilution didn't thin the oil down, and the oil worked well based on the healthy wear levels. Nice
start to this generator's file."
The translation of numbers into context is really helpful for someone like me.