[RedDevil]

I just had my oil changed.
12000 miles ago I let the dealership put Honda Green Oil in my engine.
It is somewhat thinner than 0W20.
They gave me a bottle with the remainder, and another with the oil that came out - either regular 0W20 or 5W30, as that's what the bill said on the previous oil change.

Viewing the 3 samples shows that the viscosity of the Green Oil has not been changed much over 12000 miles. It is dark as coffee but just as thin as before.
The old oil is just as dark as the Green Oil, but somewhat thicker. If I swirl it round it stops moving just a bit quicker.

I will have these samples tested professionally soon.
But by the looks of it neither oil has deteriorated much.
I got Green oil again, and am confident it will do 12,000 miles again without issues.