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This came out of a car that sat 4-5 years. Usually when I drain bad gas its brown but maybe its green because of ethanol in it.

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Copper fuel tank?

Does it smell like old gas? It looks like Prestone! (I would be tempted to test with a rad gauge to see if it is anti-freeze for some reason!) Looks like your tank is pretty clean though as it is not clouded with rust or anything.
Good job you drained it!!
Bob J.

Someone here in the past posted about finding green gas. Not sure what the eventual cause/resolution was.

Perhaps the tank was filled on St. Patty's Day!

🍀

Perhaps if the float has sunk to the bottom of the tank AND there is a large accumulation of water in the tank from using E10 and having the alcohol/water come out of solution from excessive condensation, then it would corrode the float green and stain the gas.

That looks like dye to me. Could it be some kind of additive product?

My dad and i drove the car to Gettysburg Pa the last time the car was driven this was a 2 hour drive from where i live. I parked the car with a full tank of fuel in a storage area i have and just didnt get back to it till now. I stuck a fresh battery in it and it started and ran i drove it about 10 miles and parked it. The next time i went to start it a week or so later 1 of the valves was stuck so I drained the tank. This is what i found. The tank was new about 8 to 10 years ago. I didnt use an additive just thought it was really strange for the gas to be green.

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Kev, your memory doesn't deceive you. The combination of copper, condensed water and time turns the fuel green. Please click -> here to read the full story.

Thanks for the link. Looks like my hunch was correct

Figured I'd add to the bad gas discussion, instead of green I have red. Since I got my car running fairly decent recently, I decided to hook up the cars gas tank as I was running it on a 2-1/2 gallon independent gas tank. About 3-1/2 years ago I coated the inside of the cars gas tank with a gas tank sealer called "Red Kote". I followed the instructions on the can 100% to the "T" and it had a lot of time to cure! So after I installed and hooked up the tank this is what I see in my fuel filter. I flooded the car a few times on start up and put a catch basin under the intake manifold drain tube and it doesn't look too pretty, looks scary and potential future problems! The 'Red Kote" sealer is dissolving. So I'm thinking about purchasing a reproduction gas tank that I see are now available on the internet. I was wondering if anyone has purchased one of these repro. tanks and do they fit okay, decent quality etc. ? The car is a 37 "120", tried to upload a photo but doesn't seen to be working but believe me it's red gas!