There has been much discussion on whether doing oil analysis is worth it if you change your oil anyway every 3-4,000 miles. Here's an example of why it makes a difference. I use sample results to tell me when to change oil. In my most recent sample I had the following values that stood out to me and tell me I have a leaking fuel injector.
My assessment is that there is a leaking fuel injector. I base this on these readings:
Fuel % is as high as it's ever been.
Both viscosities are as low as...
Oil Analysis value
My assessment is that there is a leaking fuel injector. I base this on these readings:
Fuel % is as high as it's ever been.
Both viscosities are as low as...
Oil Analysis value