Hello, my 2013 Chevy Volt has Fuel Maintenance warning for about 2 years, and I always use 91 Chevron gas for this car. Any advice?

From pages 9-25 and 9-26 of your owner'* manual:



I suspect you probably keep the fuel topped off but don't use much of it, and so the average age of the fuel would remain pretty old. Let it run down, say, under a half tank or even a quarter tank, then fill it up again and let it work its way down, etc. Fill up before disasters, wars, etc. that might create a fuel shortage in your area regardless.