Do Fuel Additives Work?

Do fuel additives work? It can be difficult to know for sure without taking apart your engine or tracking data over time.

Most automotive experts agree that properly maintained newer cars won’t benefit much from aftermarket fuel additives (the kind you add to your gas tank). These vehicles may show small benefits in longevity and efficiency from pump gasoline with additives such as detergents.

But older or high-mileage cars just might benefit; just beware you’re not masking a bigger problem.

If you’re wondering if fuel additives really work, here’s what you need to know.

Fuel additives are chemicals that can be added to gasoline to improve vehicle performance or help maintain systems. They can serve a variety of purposes, including:

Cleaning systems to remove deposits.

Improving gasoline flow through systems.

Lubricating systems for better operation.

Stopping gas from freezing in tanks.

Preserving gas over long periods of time.

The most common type that drivers see advertised are cleansers…

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This article was written by Whitney Vandiver and originally published on