If your intention is to run longer OCI's, you can spend $35 and get a TBN report, and estimate how long you can safely run that oil in your engine before the additives are depleted. If you can do this and extend your OCI by a few thousand miles, it won't take long before you've saved enough money on oil changes to make up the price of the analysis and more. So, there is at least a potential savings.
This is only one benefit among many of UOAs. We're all free to spend our hard-earned dollars as we please, but I feel it's worth our time to learn about the potential benefits of oil analysis before dismissing it as a waste.'
Originally Posted by cbdallas
I've switched to Pennzoil Ultra only because of the lower NOACK numbers.
I've done the same--I just hope Shell isn't lying about the NOACK spec. I will say that consumption has been very low for the past 5K miles I've been running PU.