I happened to open the fuel lid opener in the New Civic. The fuel lid says "UNLEADED FUEL ONLY" on a yellow sticker.
Last time I checked, they started selling low lead petrol within the last few years BUT not completely lead FREE. If this is correct, it may not run very well.
Does Hi-Octane have less or more lead than SUPER? I wonder if the new 1.8 engine is Hi-Octane only