If you guys remember, about 2 years ago I took 3 small jars and put gas in them. One was filled with gas that was about 4 months old, one with gas that was 2 months old and one with so-called fresh gas. I watched them all summer and little by little they all changed color. The oldest gas turned a deeper shade of yellowish orange, the middle gas did the same but not quite as deeply colored and the fresh gas by summer's end was about the color of apple juice. Then I poured out the oldest gas into the base of an upturned soda can and lit it. It burned extremely smoky, sooty and left a very sticky gummy residue. It also burned notably more slowly. Residue looked just like burned sugar or melted Saran Wrap. Same with all the others but the oldest was decidedly the worst. Why? Well, I discovered gas that had been sitting in my gas tank while I rebuilt an engine (took ~4 months) no longer was worth a flip. Below is an image. I'd be surprised if Sta-Bil or Sea Foam would help this but maybe. I think you have to use gas asap.
~ Jon 1952 1/2 ton with 1959 235 | T5 with 3.07 rear end
