
Diesel fuel is a heavy oil used in diesel engines. It has a harsh taste and is known to cause an unpleasant aftertaste if consumed. While small amounts are not expected to cause adverse effects beyond the lingering taste, diesel fuel poisoning can occur through ingestion or inhalation, leading to serious health issues. This topic explores the causes of a diesel fuel taste in the mouth, the potential health risks associated with diesel exposure, and the steps to take if accidental ingestion occurs.
| Characteristics | Values |
|---|---|
| Taste | Sour, tangy, like smoky bacon crisps, or bad quality vodka with a little sugar in it |
| Effects | Anemia, damage to linings of the throat, esophagus, stomach or lungs, fever, prolonged coughing, gastric reflux, abdominal pain, nausea, vomiting, headaches, sleepiness, dizziness |
| Poisoning | Poisoning can occur from swallowing diesel fuel or inhaling its fumes |
| Treatment | Rinse mouth, brush teeth, drink water or milk, seek medical help |
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What You'll Learn

Diesel oil poisoning
Diesel oil is a heavy oil used in diesel engines. Diesel oil poisoning occurs when someone swallows diesel oil or inhales its fumes. The harsh taste of diesel fuel makes it unlikely that a large amount will be swallowed, but poisoning has occurred in people trying to siphon gas from an automobile tank using their mouth and a garden hose or similar tube. This practice is extremely dangerous and not advised.
If you or someone you know has swallowed diesel, call your local emergency number (e.g. 911 in the US) or your local poison control center. In the US, you can reach the poison control center by calling the national toll-free Poison Help hotline (1-800-222-1222) from anywhere in the country. This national hotline will connect you with experts in poisoning who can provide further instructions.
Symptoms of diesel oil poisoning can manifest in many parts of the body, and the respiratory system is most commonly affected. Poisoning can cause chemical pneumonitis or aspiration pneumonitis, from which patients usually recover. However, serious and permanent damage can occur if diesel gets into the lungs, including a hole forming in the throat, oesophagus, stomach, or lungs, leading to severe bleeding, infection, and potentially death. Brain damage from low oxygen levels may also occur, leading to memory issues and decreased ability to think clearly.
The prognosis for diesel oil poisoning depends on the amount of poison swallowed and how quickly treatment is received. It is important to act quickly and seek medical help right away.
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Inhaling diesel fumes
The health risks associated with inhaling diesel fumes are serious, and even low levels of exposure can be harmful. The International Agency for Research on Cancer (IARC) has confirmed that exposure to diesel fumes causes cancer in humans, specifically lung cancer. This is supported by studies of workers who have been heavily exposed to diesel fumes over long periods. As a result, those who work in close proximity to diesel fumes are at the highest risk of developing lung cancer.
Additionally, inhaling diesel fumes can irritate the skin, eyes, and lungs. Skin exposure can cause dryness, cracking, and burns, while inhalation of diesel fumes can lead to lung damage, as mentioned earlier.
It is important to note that while the IARC has stated that the evidence is insufficient to conclude that exposure to diesel fumes causes cancer in humans, they have classified the exhaust fumes of diesel engines (after the fuel has been burnt) as carcinogenic, meaning they are known to cause cancer.
Furthermore, exposure to diesel fumes can result in an unpleasant taste in the mouth, as reported by individuals who have experienced it. This taste can linger for a long time and is often described as rank or horrible.
To reduce the health risks associated with inhaling diesel fumes, proper health and safety precautions must be implemented, especially in work environments where exposure is frequent. Employers are responsible for providing adequate protection to their employees who work around diesel fumes.
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Aspirating the stomach
If a person has swallowed diesel, it may be necessary to aspirate their stomach—that is, to insert a tube through the mouth into the stomach to suck out its contents. This procedure is only carried out in cases of massive ingestion if the patient is seen within an hour of swallowing the poison and if there is no injury to the oesophagus.
The decision to aspirate the stomach is made on a case-by-case basis, taking into account the amount of poison swallowed and how quickly treatment is received. The faster the person receives medical help, the better their chances of recovery.
If a person has swallowed a small amount of diesel, it is probably safe to monitor them at home. However, if they experience coughing, wheezing, trouble breathing, or a fever, medical attention should be sought.
In the meantime, it is recommended to rinse the mouth and wash the skin with soap and water. If diesel has come into contact with the eyes, they should be rinsed with large amounts of water for at least 15 minutes.
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Digestive symptoms
Diesel fuel has a harsh taste, and while it is unlikely that a large amount will be swallowed due to this, ingesting diesel fuel can cause digestive symptoms. Poisoning from diesel fuel ingestion can cause a range of digestive issues, including gastric reflux, abdominal pain, nausea, and vomiting. In one instance, an individual who accidentally ingested diesel fuel experienced sickness. Another individual who intentionally drank a mixture of diesel and water felt a little sick but did not report any other symptoms.
The onset of fever or prolonged coughing a few hours after ingestion may indicate aspiration pneumonia. This is a serious condition that may require a trip to the emergency department or even hospitalisation.
If you have swallowed diesel fuel, it is important to seek medical help right away. Do not induce vomiting unless instructed to do so by poison control or a healthcare professional. If the chemical was swallowed, immediately give the person water or milk, unless instructed otherwise by a healthcare provider. However, do not give water or milk if the person is having symptoms such as vomiting or convulsions, as this may increase the risk of aspiration.
The strong taste of diesel fuel may linger for a long time, and it may take a while for the taste to go away. Some individuals have reported that the taste lasted for an entire day, while others have stated that it left an aftertaste.
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Respiratory disorders
While a small amount of diesel fuel may only leave an unpleasant aftertaste in your mouth for a while, it is important to note that diesel fuel exposure can have serious health implications, especially for respiratory health.
Short-term exposure to diesel fumes, such as when fuelling a truck or cleaning up a spill, can cause temporary eye, skin, or respiratory tract irritation, as well as dizziness, headaches, nausea, and increased blood pressure. However, the more concerning issues arise from long-term exposure to diesel fumes and exhaust. Diesel exhaust is a specific type of diesel fume with more negative health effects than regular diesel fumes. It contains 40 different toxic compounds, including particulate matter, carbon monoxide, nitrogen oxides, hydrocarbons, volatile organic compounds, and other hazardous gases.
Long-term exposure to diesel exhaust can lead to lung inflammation, aggravating existing chronic respiratory symptoms, and increasing the frequency and severity of asthma attacks. It may also increase your risk of developing asthma, lung diseases, and heart disease. In addition, human and animal studies have indicated a possible link between long-term exposure to diesel exhaust and lung and bladder cancer, as well as adverse effects on the immune, respiratory, urinary, and cardiovascular systems.
Symptoms of long-term exposure to diesel fumes can include coughing up oil droplets and particles, and experiencing a nasty taste in the mouth, sore eyes, a sore throat, wheezing, coughing, headaches, and a general feeling of unwellness.
If you are experiencing any symptoms or health concerns related to potential diesel fuel exposure, it is important to seek medical advice from a healthcare professional.
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Frequently asked questions
Diesel fuel has been described as tangy and similar to a citrus-flavored sour candy. However, it has a harsh taste that makes it unlikely for someone to swallow a large amount.
The taste of diesel fuel in the mouth can be caused by accidentally ingesting diesel fuel, such as through sipping from a contaminated water bottle or drinking from a contaminated can.
If you get a diesel fuel taste in your mouth, immediately rinse your mouth out with water and brush your teeth. Drinking water or milk is also recommended unless you are experiencing symptoms such as vomiting, convulsions, or decreased alertness, which may indicate diesel oil poisoning.
Symptoms of diesel oil poisoning can vary but may include fever, prolonged coughing, gastric reflux, abdominal pain, nausea, vomiting, headaches, sleepiness, dizziness, and decreased oxygen levels leading to brain damage. If you suspect diesel oil poisoning, seek immediate medical attention.











































