i am not a chemist so what i'm going to say is just my logical analytical option.
if the problem is created by compounds in the gas that break down/change chemically and create a substance that clogs lines then i don't see how starting your engine periodically protects you because the gas is getting older as time passes. Stabil is designed to prevent this chemical change keeping the gas fresh.
Could be, I'm no chemist either. My thought was that any build up that settled into or clung to the small parts might be flushed out by the larger flow of gas.
adding additive in the spring is not going to solve anything assuming the gas is breaking down over the time period that it is sitting without any Stabil in it.
I was thinking of a cleaning type additive in the Spring, not a stabilizer type. My thought here was, in case there is some build up, maybe not enough to keep from starting and running well, but a build up that might cause trouble over time, that some cleaner would take care of it.
you need to prevent the problem from happening not try to cure it after the fact.
I'm just not convinced that there is a problem that needs curing.
who's to say anything settles out? maybe the varnish problem is not visible to the naked eye but is a problem when trying to run that gas thru a carb.
Well, there simply isn't anything in the tank, visible or not - I looked at an old tank that had a tiny, tiny leak near the top (only leaked when completely full - being a pack rat, I kept in case the new one developed a major leak, I could use this until I got a replacement), it was in service for 6 years, and I just scraped at it - there is no build up in there, no powder, no residue of any sort.
So, if this chemical change is homogeneous, and stays in solution and doesn't settle out, then when I get my engine started and that gas is used up the first few mowings, the problem is gone too, right? Nothing is left behind. This is why I'm not concerned. If I couldn't get it started, I'd be concerned, but that hasn't been a problem for me over the 20 years or more that I've been doing this.
maybe you have been lucky, based upon what i hear you are playing russian roulette.
Perhaps, but I haven't seen any evidence of any bullets. I'm actually a real pro-preventative maintenance guy. I do far more than most people do, hoping to avoid the bullets. But I agree with Nords take on from his military experiences - pick and chose and do it as appropriate.
Here's an example of that - my manual says change the fuel filter every year. Hmmm, I went to the store and they were not in stock, so I took the filter out, gave it a good look and blew backwards through it, and nothing was in there. I figured - what's the worst that could happen? If it clogs, it stops, I clean it out and I'm good to go. Since then I've never replaced the fuel filter either, and I've never had a problem. I pump filtered gas into a plastic can (no rust), into a plastic tank. What's to clog the filter? It's CYA for the mfg to cover everyone, including people with dirty gas cans, but if you understand what you're doing you can adjust to your circumstances.
talk to people that own antique cars and i'll bet you that every single one of them uses a gas stabilizer.
As I said earlier, lots of people do lots of things w/o having any evidence that what they are doing helps or not. They do it "just in case". Or maybe these people are not starting their vehicles a few times in the off season as I do? It might make perfect sense in that case. All I'm saying is I don't think it is for ceratin that you have to do it, I think my process is an alternative. Them doing it has no bearing on whether it is appropriate for my situation whatsoever.
We always heard of people who swore by changing their oil every 3,000 miles. There is lots of evidence these days that that was wasteful and didn't help one bit over a less intense schedule.
like i said i'm not an expert but i wanted to warn people here in view of the op post that gas is not what it used to be and i am certain that ethanol is the problem.
You're certain that ethanol is the problem, but you're not a chemist?
IIRC, the problem with ethanol is that it absorbs moisture and that it can attack some plastics. But most engines accommodate that now. I'm not aware that ethanol causes any gummy varnish problems, it might actually help clean them. I think that might be one of the problems in adding ethanol to a system that had not used it in a long time, the ethanol loosens the build up, and that clogs things, but I'd need to look that up. Brazil is using a minimum 20% ethanol blend, and has cars that run 100% ethanol. If ethanol is so bad, how do these cars run at all?
BTW, I'm not typing all this to be argumentative - I'm looking to have my ideas challenged and I'll change if I see evidence that there is a problem with the method for me, but I haven't seen that, just claims that 'everybody does it' and unfounded theories about how it might be causing problems (that I've never experienced).
If you'd like to continue, any chance you could add capitals to your sentences? It is proven to make them easier to read, the eye looks for those visual clues. Thanks.
-ERD50