Fact or Fiction: Does Gas Expire?

It’s not uncommon to find a can of gas sitting in a garage or garden shed. People commonly use gas in cars and various small engines.

However, you want to be careful about what gas you put in your vehicles. So does gas expire? What happens if you use bad gas?

Gasoline is typically a mixture of approximately 150 different types of hydrocarbons.

What Is in Gasoline?

You can expect three to six months of shelf life if you buy regular gasoline from your local gas station.

Is It Possible for Gasoline to Expire?

If your gasoline has expired, it will have a darker or muddier color. You may notice a sour or awkward smell that you typically don’t experience with gas.

How Do You Know If Gas Is Expired?

For starters, expired gas will more likely convert into a gum-like substance and create blockages in your fuel system and engine. 

What Happens If You Use Expired Gas?

Old gasoline degrades over time. If you mix old and new gasoline, you’ll only lower the quality of the new fuel.

Can I Mix Old Gas With New Gas?

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