Can I Put Water in Gas to Save Money? UNVERIFIED
Mixing water with gasoline is not a viable way to save on fuel costs and can damage your engine.
There's no confirmed answer to this yet. Below is what is and isn't known — we'd rather be honest than invent a number or a spec. This becomes a full guide the moment we can confirm it; for now, your owner's manual is the authority on your specific car.
Why You Shouldn't Add Water to Gasoline
Adding water to gasoline is a bad idea for several reasons. Firstly, gasoline is designed to combust in a specific way, and introducing water disrupts this process. Water does not burn and can cause the engine to misfire or run poorly, leading to potential damage.
Moreover, water can cause corrosion in the fuel system and engine components. This can lead to costly repairs and maintenance issues down the line. Additionally, if water accumulates in the fuel tank, it can lead to phase separation, where the gasoline and water separate, causing further complications in fuel delivery.
What Happens When You Mix Water and Gasoline?
When water is mixed with gasoline, it can lead to a variety of issues. The most immediate effect is that the engine may not run properly. Water can cause the fuel to become less combustible, leading to poor engine performance, stalling, or even failure to start.
Long-term exposure to water in the fuel system can lead to rust and corrosion, damaging components such as the fuel pump, injectors, and even the engine itself. This can result in expensive repairs that far exceed any savings you might have hoped to achieve by diluting the fuel.
Alternatives to Save Money on Fuel
Instead of trying to mix water with gasoline, consider more effective and safer ways to save on fuel costs. Regular maintenance, such as keeping your tires properly inflated, ensuring your engine is running efficiently, and adopting fuel-efficient driving habits can significantly improve your fuel economy.
Additionally, using high-quality fuel and considering fuel additives that are designed to clean your fuel system can help maintain engine performance without the risks associated with adding water.
EPA/DOE FuelEconomy.gov data retrieved 2026-07-24.