ECO = 3 cylinders.

I'd like to read the sources that say its a function of FE- were they anything definitive from Honda? Could you find one and post? There was lots of unintentional misinformation spread when the HAH (or any car for that matter) was released- journalists confusing facts or simply not soing their homework.

The Odyssey has the same system & same light on the dash.

If you are on a smooth road you can feel/sense the cylinders come on or go offline, and it is always synched with the eco light's appearance/disappearance. It's more noticeable on the Ody- larger engine.