Lobstah wrote:
JetAonly wrote:
FWIW Cummins says specifically not to use UOA to extend oil change interval. Mine uses about 2 qt in 10k miles. To extend drain interval safely you need regular oil sample to develop trends. $40 for an UOA that has acid numbers and base numbers. Pretty quick you've paid for an oil change.
I think the reason he uses a qt every 1k is because he doesn't change the oil.
IMO
Blackstone charges $25.
http://www.blackstone-labs.com/diesel-engine.php
Jim
Let's see, I can change my oil or have it tested to see if I need to change it for about the same cost. I think I will just change it.