Fuel expiry

[StockEngine]

The gasoline car I'm not too worried about. Thing guzzles gas so I can probably use it up in a month or so. Problem with the diesel cars is they either have big tanks and/or are so efficient, with my current usage it'll take me a couple more months at least to use up all the fuel.

Have you guys used any of these fuel stabilizers/biocides?

I drink hundreds of liters per month LOL, but CR is one of my trusted websites.