We’ve all done it—pushed our luck when the fuel gauge is hovering near empty, thinking we can make it just a little farther before filling up. But driving on low fuel isn’t just an inconvenience if you run out; it can actually harm your car in ways you might not realize. If you make a habit of letting your gas tank get too low, you could be setting yourself up for expensive repairs down the road.
Fuel Pump Damage
One of the most critical components affected by low fuel levels is the fuel pump. This essential part of your car delivers gasoline from the tank to the engine. Since fuel acts as a lubricant and coolant for the pump, running on low fuel can cause it to overheat and wear out prematurely.
When you constantly drive with minimal fuel, the pump has to work harder to pull in gas, which increases stress on the system. Over time, this can lead to overheating, internal wear, and even total failure—an issue that could leave you stranded and facing a costly repair.
Clogged Fuel Filter and Injectors
Your gas tank isn’t just filled with clean fuel—it often contains dirt, debris, and sediment that settle at the bottom. When your fuel level is low, the pump may start drawing in these contaminants instead of clean fuel. This can clog your fuel filter and injectors, reducing performance and potentially causing misfires or engine hesitation.
Fuel injectors are responsible for delivering the right amount of fuel to the engine at precise intervals. When they get clogged, your engine’s efficiency drops, leading to sluggish acceleration, rough idling, and poor gas mileage. Keeping your tank at least a quarter full helps prevent this problem.
Increased Risk of Overheating
Gasoline helps cool the fuel pump, but when there’s barely any fuel left in the tank, the pump can overheat. If you frequently drive on low fuel, this increased temperature can cause wear and tear on the fuel system, leading to failure sooner than expected.
When the engine isn’t getting a steady supply of fuel, it has to work harder to maintain performance, generating more heat. This, combined with a struggling fuel pump, can lead to engine overheating—especially in high temperatures or stop-and-go traffic.
Air and Moisture in the Fuel Line
Running on low fuel can also introduce air into your fuel system. When the fuel pump pulls in air instead of gas, it disrupts the air-to-fuel ratio your engine relies on. This can cause the engine to sputter, hesitate, or even stall.
Another issue is moisture buildup. With less fuel in the tank, there’s more room for condensation to form, especially in fluctuating temperatures. Over time, this moisture can lead to rust and corrosion inside the fuel tank and fuel lines, which can contaminate the fuel and damage components.
Lower Fuel Efficiency and Performance
Ironically, driving with low fuel can make your car less fuel-efficient. A struggling fuel pump and clogged fuel injectors force the engine to work harder, leading to decreased mileage. Instead of saving money by waiting to fill up, you could end up spending more on gas in the long run.
Performance also takes a hit. If your engine isn’t receiving a steady, clean supply of fuel, it won’t run as smoothly. You may experience poor acceleration, hesitation, or even stalling—none of which are ideal, especially in traffic or on the highway.
Potential for Engine Damage
In extreme cases, running on empty can cause serious engine damage. If the fuel pump completely fails or the engine misfires due to inconsistent fuel delivery, it could lead to internal wear and tear. Continually straining the engine increases the risk of costly repairs and breakdowns.
How to Avoid Low Fuel Damage
The best way to prevent these issues is simple—keep your fuel tank at least a quarter full at all times. Regularly filling up helps maintain fuel system health, improves engine performance, and prevents costly repairs.
If you’ve been running on empty frequently, it is a good idea to have your fuel system inspected to ensure everything is functioning properly. In Bakersfield, CA, where long drives and hot weather can put extra stress on your car, taking care of your fuel system is even more important.
Running on empty too often? Your fuel system may already be at risk. Stop by Circle M Tire & Automotive in Bakersfield, CA, for a thorough inspection and make sure your car stays road-ready. Don’t wait—schedule your visit now!