Originally Posted by Triple_Se7en
Originally Posted by Gubkin
Oil is DEAD (2.78 TBN)
1) Use 5w-40 or 10w-40 SN Plus
2) decrease interval to 5k miles
No it's not.
TBN is not dead at 2, let-alone 2,78
But I do support 5K OCIs here. Reason?... UOAs determine oil life, not engine life of a TDGI / GDI.
First off most likely I plan to back the interval down but where the confusion on comments comes is on shortening the interval and solving high iron. I even have some early Blackstone samples with short intervals and the iron was high then, obviously the iron goes up with mileage. So with that said in my mind shortening the mileage just shortens iron from the fact you are dumping the oil more often. Now as far as running 5w30 instead I can buy that. Nothing on any of my intervals says anything is really wrong besides excess silicon and iron, again I'm open to any suggestions I just don't think going all the way down to 3k is going to answer my question of high iron, besides hiding it behind several oil changes essential keeping the results watered down.
Something I wanted to add is from research high iron is a direct result of high silicon (dirt ingestion). This even throws me some because they mention usually aluminum wear also climbs up with dirt ingestion. Now I'm not an engineer or expert I was just trying to understand. More oil changes will help through sheer dilution but I don't think they solve the issue. Does Kia's filter material suck on the air filter in general?