I've been using marine Stable in my car when I store it for 3 months each summer. Been doing it for the past 3 years without a problem. It starts right up and runs fine every time. I used the marine stuff simply because I have it around for the boats.
StaBil contains petroleum distillates, not "oil". The same compound are already found in gasoline. The anti-oxidants and detergents are the same things already added to pump fuel in lower concentrations.
I also use marine StaBil in my lawn mower and chain saw fuel all year long. Great stuff. It contains the same things as regular red StaBil except at higher concentrations so that you don't need to add as much to large tanks such as those found in boats.
2008 Grady White 226, F250 Yamaha
2004 Carolina Skiff J16, DF40 Suzuki
Too many other boats over the years to list