Handheld engine oil tester
 

lubricheck.com

I ran across this in one of my industry magazines. He gets the Innovator of the Year award from Lubrication Management & Technology magazine. Seems like a good idea. From what I can tell it measures conductivity so it shows when acids (more conductive) increase. I'd probably want to correlate it to a Blackstone lab result the first time or two to satisfy my skepticism. For $40 it could very well replace a whole bunch of Blackstone lab reports.

Let the oil discussion begin yet again - or not.

lubricheck
 

I have been interested in this for a while. I would buy one if it was proven effective, just not sure acidity is the best way to check your oil. Also, tough to find a place to buy one.

I have an integrated engine oil tester, most call it oil pressure gauge. When idle oil pressure goes down 0.2-0.3 bar at normal engine temp you can tell the oil has sheared too much.

I've got one that's older than dust... don't know why this one is innovative. I've never used it though.

Resistivity doesn't account for the many ways in which oil may reach end of life. Factors such viscosity, various insolubles, TBN, TAN, % fuel, % water, etc...

I don't think a yearly Blackstone report is necessary for my vehicle (I do yearly oil changes at 12,000 miles), but I do it anyhow because I share the results on various forums and the data adds value to the community.