Originally Posted By: 2010_FX4
Originally Posted By: TallPaul
Okay, what to do. I have Redline 5w20 sitting in my crankcase at 10,000 miles and plan to do an analysis. I have a Blackstone kit. I understand it's about $25 and an added $10 for TBN. Guess I don't need TBN on Redline. More interested in wear metals etc. Anyhow, I hope to change it out next week and send it in. Will definitely post it here.
If you have never ran a TBN on Redline in your particular application with 10K OCIs it is probably worth paying for the TBN on at least one UOA to know where you stand. It is cheap insurance...
Exactly especially on extended drain intervals with synthetic oil.
Every engine may differ, driving environment such as stop and go, mostly highway. Say you drive 25 miles to work clear sailing at 50 mph so that's 1/2 hour on the oil. But stop and go 50 miles may take 1 hour on the oil. Same miles but different hour usage.