Yes its quadrajet or better known as quadrabog. They have plugs at the bottom of the mail fuel bowl (design flaw? or just ease of manufacture?) Anyway this new gas destroys the seals. A buddy who works on a ton of GM stuff says this is getting to be a BIG issue for guys in the GM camp. We sealed it up w JBweld but then he put some time of clear coating over that. Anyway it sat on the bench for 3 days and didn't loose a drop, so I'm guessing it worked. Spring will tell all as I mentioned she just went into storage for the winter.
This all being said. I NEVER had this issue till 2013. I've owned this car twice as long as I've owned NIKKI, so I don't know if there was another "reformulation in '13 or not.