What is cheaper? An engine or a couple of extra oil changes a year. I would not go 10K.
Definitely the oil. If I'm sitting on a ticking time bomb though, I want to trade it in before [censored] hits the fan.
I don't know squat, but I'd do what B-S suggests; if a 5K interval produces 1/4 the wear...
I'd try to establish whether the wear is linear, or geometric etc.
Will do a couple shorter OCIs and see what it does.
Your engine has only had 3 oil changes in 30K. Thats about 3-5 less OCIs than the average person. While your wear is high its due to the long OCIs and the engine breaking in. If you want to see if you can get lower wear, do a few short OCIs and then sample. That oil looks WEAK as well. What oil is specified for this engine? It looks like it needs to move up to M1 0w40 if that is an approved oil. I'm assuming this is a diesel engine?
This is a 2011 VW Jetta TDI. I am running both the 10K mile oil changes specified by VW, as well as the Castrol SLX Pro LLO3 full synthetic 5W-30 that is both specified and factory.
Did coolant somehow get in the oil? The K+ is lower but was really high initially.
I have had no coolant loss or leakage.
3,000 mile oci never hurt anyone.
Actually, multiple UOAs have found that shorter intervals can actually increase wear in these VW TDIs