Originally Posted By: DuckRyder
I have never had an issue with the head gasket and it isn't down on coolant.
There was another UOA with unexplained high potassium recently so that reading is questionable to me - I will keep an eye on it of course but I'm not going to sweat it unless it continues.
Another factor is that the 10,075 run had a long highway run and was the only one that I added any make up oil to, this run was more normal usage so I'm not surprised it does not look as good.
I did not take this sample so the sampling method could be suspect, it is at least inconstant with most of the others.
As for universal averages, Back in 2011 Blackstone said the universal averages in the last column were based on about 5300 miles.
Originally Posted By: HTSS_TR
Silicon is dropping from 14-15 PPM to 9 PPM, how old is the air filter ?
Wear metals are low, iron is double digit but still low after 9k miles.
I don't have the records on me, but I think I have not changed the air filter since the 100,000 service. It is a Honda filter.
Everything seems pretty much in line with the universal averages, and better in some cases. I'd say it looks pretty good, overall.