01-22-2016, 01:45 PM
I have a vehicle I seldom drive. The gasoline gets "stale."
What is a good gasoline stabilizer?
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PRI-G (Shell) is probably the best and most concentrated. Before you decide it's expensive take a look at the dilution ratio. It does not contain alcohol and inhibits phase separation and protects fuel from evaporation.
Sta-Bil is a common brand available everywhere. Not as concentrated, but is a tall-oil that works similarly inhibiting evaporation and phase-change.
Either is fine and I would just avoid isopropanol based products. These were useful before widespread alcohol blending and were mainly to keep water mixed into the gas, rather than settling. With so much ethanol in fuel now (you are in CA), the last thing you need is more.
2 things; First, I have used a product named Sea Foam. How its name correlates to fuel stabilizer escapes me. Second, for long term storage and general use I'd recommend using ethanol free gas. Since you live in the land of Oz I checked and it is sold there. There is a website named pure-gas.org that lists locations by state. I use ethanol free gas in my lawn equipment and chain saws. It's far cheaper than replacing the seals in the engines.