It does sound like bad gas. It may not be water in the fuel. Old gas will do funny things as well. If the station doesn't do much volume the fuel could have gotten a bit aged. Modern gasoline goes bad a lot faster than the old stuff did. I would probably just run it down some and then fill with good gas.

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Whoever said there's nothing more expensive than a cheap Mercedes never had a cheap Jaguar.

83 300D Turbo with manual conversion, early W126 vented front rotors and H4 headlights 401,xxx miles
08 Suzuki GSX-R600 M4 Slip-on 26,xxx miles
88 Jaguar XJS V12 94,xxx miles. Work in progress.
99 Mazda Miata 183,xxx miles.