Do subarus have reserve gas tanks?
Subarus generally do not have a dedicated reserve fuel tank. They use a single fuel tank, and the “reserve” you hear about is simply the remaining fuel in that tank when the gauge shows empty. In practice, drivers should refuel before reaching that point to avoid running out.
To understand why this matters, it helps to know how Subaru’s fuel system is designed, what the fuel gauge indicates, and how much fuel is typically left once the low-fuel warning appears across popular models.
Single-tank design in Subaru models
Most Subaru passenger cars are built with one main fuel tank. There is no factory-installed second tank, and Subaru manuals do not describe an official reserve tank option. The fuel gauge’s E mark signals that the main tank is low, not that a separate reserve is available.
What this means for drivers
Because there is no reserve tank, the remaining fuel is simply the portion left in the main tank. The practical driving range after the gauge reaches E varies by model, engine, driving conditions, and tank size.
What happens when the gauge reads "E"
The distance-to-empty (DTE) estimate on Subaru models is a helpful guide, but it is an approximation. Once you’re near E, the actual usable fuel can be less than the gauge suggests, especially with stop-and-go driving, hills, or heavy loads. Plan to refuel before the low-fuel warning to avoid the risk of running out, which can leave you stranded and could complicate modern fuel-injection systems.
Estimated remaining fuel by model
Below is a quick-reference look at typical remaining fuel when the low-fuel warning appears for several common Subaru models. The figures are approximate and can vary by year, trim, and individual vehicle condition.
- Forester: roughly 2 to 3 gallons may remain after the gauge hits E (varies by year and trim).
- Outback: typically around a couple of gallons left at E, depending on the tank and model year.
- Crosstrek: generally about 2 to 3 gallons remaining when the warning lights up.
- Impreza/Legacy: around 2 gallons or more, depending on the specific tank size for the model year.
These figures are approximate and can vary by model year, driving style, and fuel quality. Always refuel before you reach E rather than relying on a fixed reserve amount.
Practical tips for low-fuel situations
If you find yourself near the empty mark, follow these guidelines to stay safe and maximize the remaining range while you plan a refuel.
- Refuel at the next available opportunity rather than extending the drive on fumes.
- Drive conservatively: smooth acceleration, steady speeds, and minimal braking can improve mileage.
- Keep tires properly inflated and remove unnecessary weight from the vehicle.
- Avoid aggressive driving and high-load conditions (e.g., hills with heavy cargo) when nearing E.
In practice, these steps help you avoid getting stranded and optimize the remaining fuel until you reach a fueling station.
Summary
Subarus generally use a single fuel tank, with no official reserve tank option. The “reserve” you might hear about is simply the leftover fuel in the main tank when the fuel gauge shows empty. Remaining fuel after E is model- and year-dependent and should not be treated as a guaranteed reserve. Plan to refuel before reaching E, and rely on model-specific ranges and DTE estimates as rough guides rather than absolutes. Always refer to your owner’s manual for model-specific fuel tank capacity and guidance.
Can you drive 20 miles on empty?
Yes, you can likely drive 20 miles on empty, as most cars can travel an average of 30-50 miles after the fuel light comes on. However, it's risky because factors like your vehicle's age, condition, and driving habits can affect your remaining range, and consistently running the tank low can damage your fuel pump and other components. It is best to refuel as soon as the "E" or low fuel light appears to avoid these risks.
Why it's risky to drive on empty
- Fuel pump damage: The fuel pump is lubricated by the gasoline in your tank. When it runs out, it can overheat and draw in debris from the bottom of the tank, leading to premature failure.
- Catalytic converter damage: If you run completely out of gas, the engine can stall and cause the catalytic converter to overheat, which can lead to expensive repairs.
- Inaccurate estimates: The "miles to empty" (DTE) estimate is not always perfectly accurate. Factors like towing, weather, and driving conditions can significantly reduce your actual range.
What to do instead
- Refuel immediately: The safest option is to find a gas station as soon as the low fuel light comes on.
- Consider your car's specifics: Some vehicles have a larger reserve than others. If you're in an older model or a large truck, your reserve may be different from the average.
- Avoid low fuel habits: Don't make a habit of driving on empty, as the cumulative effect of the strain on your fuel system can cause problems over time.
What is the gas saving feature on a Subaru?
Auto Start Stop is engineered to reduce fuel consumption, exhaust emissions, and idling noise.
How much gas is left when the light comes on a Subaru?
A good rule of thumb is 2 gallons before empty when the light comes on all cars. Also use the range indicator as a reference. In other words, it's time to refill.
Do cars have a reserve after 0 miles?
Brandon Pfab they factor a reserve into the system, so when it says 0 you actually still have a good bit of gas, the pump relies on being submerged in fuel to keep it cool, gasoline stays pretty cold and thats what keeps the pump from overheating, you run the tank dry and now the pump is running with nothing to cool it ...
