I don't think I've read on these particular engines, but a few years back some of the early DI's... Was making a generalization.
If it is oil getting past the valve seals, I'd think it would take a bit for that to polymerize esp w/ the intake air blowing past it keeping it somewhat cool..
If it is oil getting past the valve seals, I'd think it would take a bit for that to polymerize esp w/ the intake air blowing past it keeping it somewhat cool..