Can I stabilize gas that has been sitting for a year?[SOLVED]

Thanks for the question Victoria. When using a fuel stabilizer like Sea Foam, it works best when added to fresh fuel. Adding to year-old fuel means the fuel has had 12 months to degrade, so nothing can restore the gasoline to new. My encouragement is to come up with a plan to get rid of the gas in the Mustang. What I would do:  If the car has to sit, I would siphon the tank gas into storage cans, then burn the older gas in a vehicle driven regularly. The old gas will work fine if mixed with new gas.

I purchased a 2006 Hyundai Accent that was not driven in years. Replaced several things but still feels shaky. Would this product help?

I have an old 70 Buick GS 455 that’s been sitting a the shop for a year with a full tank of gas/metal tank. They’ve finally finished the rebuild and I figured the old gas would need to be syphoned. Considering I use Sea Foam every (roughly) 3 tanks of gas in the car, I don’t believe this last tank had any in it. Can I run it down with the new rebuild, then add seafoam to the last 2 gallons before adding full tank and another can of seafoam? What’s your thought? I’d rather syphon with the new rebuild but I don’t have 1000000 dollars to fill the thing back up and I’m anxious to get back behind the wheel!!!

Good question. I’m in the same boat with fuel prices : )

If the fuel is only a year old, you should be fine to run it down. You’re on the right track with the Sea Foam idea. I’d only change one small thing.

Here’s what I’d do:

Wait until you have a low tank of fuel (2-4 gallons). Add a full can of Sea Foam High Mileage (or regular Sea Foam Motor Treatment). Then, drive until almost empty before filling up the tank. That will give you a high cleaning concentration that will do a great job cleaning the entire fuel system and help remove any heavier gum/varnish/etc. that developed while it sat.

Enjoy the rebuild!

Do I have to drain my 91 Corvette tank that’s been sitting for 3 years before I even start it?

Hey Doc – it should start and run fine. That said, it’s always best to use fresh fuel (especially if you probably won’t go through the existing fuel for a while).

Here’s what I’d do, just to be safe: I’d siphon the fuel out of the Corvette and add it to a partially full tank of a vehicle that’s used regularly. That way you can get a fresh start for your Corvette.

If you want to clean out the fuel system of the Corvette, add a full can of Sea Foam High Mileage to 2-4 gallons, and run it until almost empty before refueling with fresh fuel. That will clean out any gum/varnish that developed while it was sitting.

Either way, up to you. Hope that helps!

Many Thanks Conner! I really appreciate your time and information. DOC