- Joined
- Feb 15, 2023
- Messages
- 10
I'll start by saying that this question is somewhat academic at this point, because I've now used up most of the gas with no apparent ill effects. But I am curious about others' thoughts on this: I had to store my 1988 Porsche 911 for what I thought would be 6 months, but turned out to be 18 months. Before I parked it, I filled the tank and put in a fuel stabilizer. Over the next 18 months I drove it for short periods a couple of times, and that was it. Now I'm back to being able to drive it frequently, and I had naively thought I would just add more stabilizer to the existing tank of gas and then finish it off at my leisure. Then I discovered that, first, you can't add stabilizer to old gas and expect it to do anything, and second, the stabilizer I used is only good for 12 months. Since the engine seemed to run absolutely fine, and because there was on the order of 60 liters of gas still in the tank, I opted to just try to burn through the rest of it as soon as possible. Some people felt that I should use 1/4, fill the tank, use 1/2, fill the tank, etc., basically diluting the older gas over time. Others felt that I should not dilute it, and just use up all the old gas as fast as possible. But these were just opinions not backed up by anything. My question: does anyone have facts/data about gasoline that would support one or the other of these choices? What exactly happens to gas over longer periods of time? People say it "breaks down," but I'd like to know more specifics just because I'm curious. Thanks!