You're well over the 90 day mark where E10 is well into its degradation and standard unleaded is starting to sour. A nice problem to have in many respects, but just to be aware!
I’ve already topped out the tank with 95 (as it apparently has a better shelf life than 93) and will be driving in HEV mode until it’s nearly empty, thereafter I plan on generally only filling up with 10l at a time unless I’m going to be doing a long distance trip.