I wonder if a simple water/methanol injection into the inlet tract would give enough protection to the valves to stop the build up?

Kits are available but expensive and aimed at forced induction. We need a competent expert to evaluate possible benefits, and come up with a simple kit for the GDi.

I won't hold my breath. Mine is just at 10,000 miles and I'm tempted now to take the manifold off over winter to see what 10,000 miles looks like.


DaveW
'05 Red Roadster S1
'16 Yellow (Not the only) Narrow AR GDI Plus 4