How long can gas sit in a car?

FAQs → How long can gas sit in a car?

I've seen many preppers and survivalists worry about the shelf life of gasoline stored in their vehicles. As someone who's been there, done that, and got the t-shirt (literally—I once spilled gas on my shirt during a fueling stop!), let me give you a straight answer:

The short answer: Regular-grade gasoline typically degrades over time due to oxidation, contamination, and other factors.

The long answer: It depends on various factors like storage conditions, fuel quality, and maintenance habits. Here's a rough breakdown:

• If stored properly in a clean, dry tank with minimal exposure to air, light, and moisture, regular-grade gasoline might last around 6-12 months before noticeable degradation occurs.

• If you're storing gas in an older vehicle or one that's not regularly used, the fuel quality can degrade significantly faster—potentially within a few weeks or even days. This is especially true if the tank isn't properly maintained (e.g., sediment and condensation can build up).

• Premium gasoline typically has a longer shelf life than regular-grade due to its higher octane rating and additives, but this still doesn't guarantee it'll last indefinitely.

• Fuel quality and stability also depend on the region you're in. For example, if you live in an area with extreme temperatures, humidity, or exposure to sunlight, the shelf life of your gasoline might be shorter.

While regular-grade gasoline can sit for a few months without significant degradation, it's crucial to store it properly and maintain the vehicle's tank to ensure the fuel remains stable. Always check the gas quality before using it in an emergency situation.