Does Using Reserve Fuel Damage a BMW?
1 Answers
Using reserve fuel can damage a BMW. The fuel pump is typically located inside the fuel tank, but when the tank is empty, the pump is exposed to air, lacking lubrication, which can affect its lifespan. Therefore, it is best to avoid using the reserve fuel tank and not wait until the fuel is nearly depleted before refueling. Do not wait for the yellow warning light to refuel: Before driving, check the fuel gauge and calculate whether you need to refuel based on the distance of your trip and the fuel level. It's advisable to refuel in advance rather than waiting for the fuel warning light to come on. The fuel pump is located inside the tank and operates at high temperatures during continuous use. Being submerged in fuel helps cool it effectively. When the warning light comes on, it indicates the fuel level is below the pump. Repeatedly waiting for the light to refuel can shorten the pump's lifespan, and having too little fuel in the tank may even cause the pump to burn out. Refuel in the morning or evening: Generally, temperatures are lower in the morning and evening, and gasoline has a lower vaporization point. Therefore, it's best to refuel during these times. Gasoline expands with heat and contracts with cold, and it is sold by volume. At lower temperatures, gasoline has a relatively higher density, meaning the mass per unit volume increases, allowing you to get more fuel for your money.
