First UOA on my 18 Sierra

ForestryGuy · February 27

I thought I’d share my UOA results and see what others experience is. I’ve owned my 2018 Sierra 1500 since new. 5.3l w/ the 6l80. I’m at 120,000 now and last oil change I sent off the sample to Blackstone to see what’s going on and if I had any metal or signs of odd wear. Oil changes were mostly done at my local dealer at the recommended intervals but since 100k I’ve been changing at every 5k. Disabled dod around 90k miles with Diablo tuner.
I’m very happy to see the results that came through and will do another analysis with the next few oil changes so I get statistically sound numbers. In my opinion this is a testament to good maintenance and driving habits. This truck will be driven till the wheels fall off lol.
Have others done UOAs and what did your results look like?

newdude · February 27

First one? In 120,000mi?

ForestryGuy · February 27

39 minutes ago, newdude said:

First one? In 120,000mi?

Yeah I never really thought about it before and decided why not. Always been on top of maintenance so never worried too much. The thinking was also if I had a lifter going down I’d have some identifiable metal showing up.