Sylvie Willis
Gas stations typically have separate pumps for diesel and gasoline. While diesel engines work by spraying fuel into a cylinder filled with high-temperature compressed air, allowing the diesel to combust spontaneously, gasoline engines cannot provide diesel with the temperatures needed to combust. Therefore, if you put diesel in a gas-powered car, your vehicle will shut down once it runs out of gasoline, leaving you stranded. This is an expensive mistake that may require a mechanic to fix.
| Characteristics | Values |
|---|---|
| Will gas stations let you pump diesel fuel? | Yes, gas stations have diesel pumps. However, the number of diesel pumps available varies. Some gas stations have more diesel pumps than others. |
| Issues with diesel pumps | Diesel pumps may be clogged or faulty, causing them to stop dispensing fuel prematurely or not work at all. |
| Confusing diesel with gasoline | Putting diesel in a gasoline-powered car can be costly. Diesel won't ignite in a gasoline engine, and you may need a mechanic to drain your fuel system. |
| Pump handles | Diesel pump handles may be wet with fuel due to drips and spills, which can be frustrating for customers. |
| Pump locations | Gas stations with truck stops or truck lanes typically have diesel pumps. Some gas stations have diesel pumps in the front, while others have them at separate truck islands. |
| Pump identification | Pump labels indicate the biodiesel percentage (e.g., B5, B10). It is important to ensure your vehicle is compatible with the maximum biodiesel percentage. |
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What You'll Learn
Pump handles are often wet with fuel
The dirtiness of pump handles is a common issue at gas stations. In addition to fuel, pump handles can be breeding grounds for harmful bacteria and viruses. According to a study by Kimberly-Clark Professional, gas pump handles are the filthiest surfaces that people regularly encounter.
To avoid the germs and dirt on gas pump handles, there are several precautions that can be taken. One method is to use paper towels to hold the fuel nozzle and pump handle. Another option is to wear disposable gloves while pumping gas. Sanitizing wipes can also be used to wipe down the pump handle and other touchpoints.
It is important to be aware of the potential dirt and germs on gas pump handles and to take the necessary precautions to protect yourself. By taking simple measures such as using paper towels, gloves, or sanitizing wipes, you can minimize your exposure to these contaminants and maintain better hygiene.
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Confusing diesel with gas can be an expensive mistake
Confusing diesel with gasoline when filling up at the pump can be a costly mistake. The consequences of this mistake depend on the type of vehicle you have and the amount of incorrect fuel added. If you realise your mistake before driving off, you may be able to avoid some of the issues by not starting your car and contacting a mechanic.
Gasoline engines cannot combust diesel. This is because diesel doesn't readily mix with air unless certain conditions are met. Gasoline engines cannot provide diesel with the temperatures it needs to combust, and because diesel cannot evaporate sufficiently, it won't ignite when the spark is released. As soon as the last drops of gasoline in the car's system are gone, the vehicle will shut down, leaving you stranded.
Diesel fuel is heavier than gasoline because it is made up of large molecules. It has a higher flash point and auto-ignition temperature. Even a small amount of gasoline contamination in diesel fuel can cause issues, such as premature ignition, which can lead to engine damage.
To avoid putting diesel in a gasoline car, pay close attention at the pump. The nozzles on diesel pumps are often designed to be too wide for most gas tanks, and the handles are sometimes coloured green. However, there is no universal chromatic system, so it is important to read the label before filling up.
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Diesel fuel pumps sometimes stop dispensing mid-way
Gas pump nozzles are designed with a safety mechanism that stops the fuel flow when gasoline runs back into the nozzle. This usually indicates that the tank is full. However, this is not always the case, and there are several reasons why a diesel pump may stop dispensing mid-way.
Firstly, the gas may be coming out at a pressure that is too high for the car to take in. This can be caused by holding the nozzle at a sharp angle, which can cause fuel to splash back and trigger the shut-off mechanism prematurely. It is recommended to hold the nozzle at a moderate angle to ensure a smooth flow.
Secondly, the vent in the fuel tank venting system may be blocked or malfunctioning, creating pressure issues that cause the pump to shut off. This can be caused by dirt, debris, or spider webs, and regular maintenance of the fuel system can help prevent these issues.
Thirdly, the handle of the pump may be worn internally, causing the mechanism that holds it to malfunction. In this case, switching the handle with another pump can determine if the problem lies with the handle or another factor.
Additionally, the pump filter may become clogged, or there may be a power loss, causing the pump to stop dispensing. Seasonal changes can also affect the performance of the pump, with high temperatures causing fuel to expand and increase vapor production, which can influence the fueling process.
It is worth noting that different gas stations may have varying sensitivities in their pump nozzles, and trying another station may help determine if the issue lies with the vehicle or the station's equipment.
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Gasoline evaporates, diesel doesn't
Gasoline evaporates, but diesel doesn't. This is because diesel is made up of compounds with oilier properties than gasoline. While gasoline contains compounds with low boiling temperatures, diesel contains compounds with higher boiling temperatures, making it thicker and oilier. As a result, diesel has a longer shelf life than gasoline.
The vaporization temperature of diesel is approximately 140°F at atmospheric pressure. Below this temperature, diesel will take a long time to evaporate. This is why you can smell diesel at normal temperatures and pressures, as the presence of an odour indicates that a substance is evaporating. However, diesel does not evaporate as quickly as gasoline, which can be observed when diesel is spilled and remains in a liquid state for a longer period of time.
The difference in evaporation rates between gasoline and diesel has implications for fuel handling procedures. For example, vapor recovery is required when filling gasoline tanks to capture and recover the evaporated gasoline vapours, but this is not necessary when filling diesel tanks. Additionally, the oil content in diesel can cause it to collect dirt and build up over time, leading to dirty fuel pump handles at gas stations.
Some individuals who frequently fill their vehicles with diesel fuel choose to wear gloves to protect their skin from the oil and to avoid the strong diesel odour. This is especially common among commercial drivers. The gloves can become saturated with oil over time, rendering them useless for any other purpose.
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Truck pumps run a higher biodiesel percentage
Biodiesel is a renewable, biodegradable alternative fuel made from a mix of modified vegetable oils and diesel fuel. Biodiesel blends are becoming increasingly common, with most diesel passenger vehicles already running on fuel that contains some biodiesel.
The percentage of biodiesel in a blend is indicated by the letter B followed by a number. For example, B5 is 5% biodiesel and 95% petroleum diesel, and B20 is 20% biodiesel and 80% petroleum diesel. ASTM International develops specifications for conventional diesel fuel, and according to their specifications, biodiesel concentrations of up to B5 can be labelled as diesel fuel without separate labelling at the pump. B20 is a common blend as it represents a good balance of cost, emissions, cold-weather performance, and compatibility with conventional engines.
While biodiesel has some notable advantages, there are also some potential drawbacks to consider. Pure biodiesel contains less energy on a volumetric basis than petroleum diesel, so the higher the percentage of biodiesel, the lower the energy content per gallon. High-level biodiesel blends can also impact engine warranties, gel in cold temperatures, and present unique storage issues. Additionally, while biodiesel generally results in less air pollution, nitrogen oxide (NOx) emissions tend to be slightly higher when using biodiesel.
To avoid engine operational problems, high-level biodiesel blends like B100 must meet specific standards and requirements. It is also important to ensure that the biodiesel fuel has been fully transformed from oil to avoid issues such as deposits on injectors and injector pump, which can affect fuel spray patterns and engine performance. Despite these considerations, most would agree that the benefits of biodiesel outweigh the potential problems, and the market's growth is expected to continue as biodiesel becomes more readily available.
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Frequently asked questions
No. Putting diesel in a gas-powered car can be an expensive mistake. Gasoline engines can’t provide diesel with the temperatures it needs to combust, and because it’s unable to evaporate sufficiently, diesel won’t ignite when the spark is released.
Yes. Gas stations have diesel pumps for diesel-powered vehicles.
Yes, you can use either the truck pump or the regular pump station. However, make sure to check the label on the pump and ensure that your ambulance is compatible with the maximum biodiesel percentage indicated.
Depending on how much diesel you’ve poured into the tank, there’s a good chance you will need a mechanic to drain your car’s fuel system.
