2015 Honda Civic 1.8L - 6612mi OCI - Castrol GTX FS 0W-20

[The Critic]

My understanding was also that newer oils had lower overall TBN and that it's less important now than in older oils. Given that this oil had a TBN still above 2 and the oxidation/nitration appear to be within the normal range, my take is that the oil is still in okay shape, basically the OLM is accurate for these driving conditions. It would be nice to have a baseline for the oxidation/nitration values so see how much they actually changed.

You'd need to get a VOA for baseline, but given the cost of this oil, the economics don't support the approach.

 

[VTECOverRated]

Interesting. Didn't know NA honda's have fuel dilution.
Wondering if its only on the 4 cylinder's because they are so **** small and the injector probably sprays right into the cylinder wall...