Katerina Swanson
Adding ATF to diesel fuel is a controversial topic. Some people claim that it can improve pump and injector longevity, clean the inside of the engine, and increase fuel economy. However, others argue that modern diesel injection pumps operate under much higher pressures and that ATF can cause more problems than it solves. There are also concerns about ATF causing damage to plastic components in newer engines and voiding warranties. While some people have reported success with using ATF in older engines, it is generally recommended to use specialized additives designed for modern diesel engines.
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Injector clogging
Service stations with debris and sediment in their storage tanks can also lead to injector clogging. Over time, fuel left in the tank can result in the formation of varnish and gunk, which can clog injectors. Additionally, the use of ATF or engine oil in the fuel tank can cause injector clogging and other issues.
There are several signs that your diesel fuel injectors are clogged. One of the first signs is diminished engine performance, such as difficulty starting the vehicle, rough idling, a lack of power when accelerating, or stalling. Another indicator is a sudden decrease in fuel economy, with the engine burning more fuel than necessary. Visible and olfactory clues include thick smoke coming from the engine or exhaust, with the smoke being black or blue due to excess emissions. Engine misfires, knocking, or loud pinging sounds may also indicate clogged injectors.
Diagnosing clogged fuel injectors can be challenging as they share similar symptoms with other issues, such as bad coils or dead spark plugs. One method is to start the engine when cold, let it idle for 5-10 seconds, and then touch the exhaust manifolds to identify any that are not warm. If one is found, remove the connector from the injector on that cylinder and inspect for corrosion.
To properly unclog a fuel injector, the injector must be removed from the engine and cleaned externally. While there are injector cleaning additives available, they are ineffective unless they can get inside the injector. It is recommended to use a professional injector cleaning service to ensure thorough cleaning and proper reassembly.
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Fuel lubricity
Lubricity is a term used to describe a lubricant's ability to minimise friction and damage between surfaces in relative motion under load. In the case of diesel fuel, lubricity is the fuel's ability to minimise friction and damage between surfaces in relative motion under boundary lubrication conditions.
The lubricity of diesel fuel can be measured through vehicle tests, pump rig tests, or bench tests. Vehicle tests are the most representative of real-world conditions but are very expensive and time-consuming. Pump rig tests are a more affordable alternative, where a fuel injection pump is mounted on a test stand and driven by an electric motor while fuel is circulated through the pump for a specified time. Bench tests are the most inexpensive and rapid option, with the most common being the High-Frequency Reciprocating Rig (HFRR) test and the Scuffing Load Ball-on-Cylinder Lubricity Evaluator (SLBOCLE) test.
The introduction of low-sulphur diesel fuels has caused concerns for diesel-powered vehicle owners as the process of removing sulphur also removes oxygen and nitrogen, which are important for the lubricity of the fuel. The lack of lubricity in diesel fuel can cause excessive wear and eventual failure of fuel pumps and injectors, which are the most vulnerable components when there is a lack of lubricity.
To address the issue of low lubricity in diesel fuel, additives such as Hot Shot's Secret LX4 Lubricity Extreme can be used. This additive is designed to increase lubricity and provide additional protection for all fuel systems, including pumps and injectors. It is safe for emissions equipment and can be used with other fuel additives.
While some sources suggest adding ATF (Automatic Transmission Fluid) to diesel fuel, this is not recommended by most mechanics and experts. Modern diesel injection pumps operate under much higher pressures and ATF can cause more problems than it solves. There are better and cheaper additives designed specifically for diesel engines that should be used instead.
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Fuel additives
The use of automatic transmission fluid (ATF) as a fuel additive in diesel engines is a highly debated topic, with varying opinions and experiences shared online. While some individuals claim that adding ATF to diesel fuel can improve engine performance, mileage, and fuel pump and injector longevity, others strongly advise against it, citing potential risks and newer, better alternatives.
Proponents of adding ATF to diesel fuel argue that it can effectively clean and lubricate injectors, valves, and the inner fuel system, resulting in improved engine performance and increased mileage. Some users have reported noticeable improvements in their vehicles' performance and fuel efficiency after adding ATF. It is suggested that ATF can help remove carbon build-up and unclog injectors, leading to smoother engine operation. Additionally, ATF is said to improve pump and injector longevity, especially in older diesel engines with mechanical injectors.
On the other hand, many experts and mechanics advise against using ATF as a fuel additive in modern diesel engines. They argue that today's diesel injection pumps operate at much higher pressures and are made from different materials, making them incompatible with ATF. The high-pressure environment, coupled with the chemical makeup of modern ATF, can potentially damage plastic components in the injectors. Additionally, ATF contains friction modifiers intended for clutch packs in transmissions, not for the tight tolerances of modern injection pumps.
Furthermore, there are concerns about voiding warranties if ATF is used in newer diesel engines. Modern engines have stricter requirements and operate with computerized systems, and using ATF may pose risks that are unnecessary given the availability of purpose-built additives. There are now several high-quality, affordable fuel additives specifically designed for modern diesel engines that can enhance lubricity and improve performance without the potential drawbacks of ATF. Products such as Howes, Lucas, FPPF, Power Service, and Marvel Mystery Oil are recommended by some users as effective alternatives to ATF. These products are formulated to work with modern diesel engines and can provide the necessary lubrication and performance enhancements without compromising the integrity of the fuel system.
While the use of ATF as a fuel additive in older diesel engines may have been a common practice in the past, the evolution of engine technology and fuel formulations calls for updated approaches. It is always advisable to consult with trusted mechanics or diesel specialists before adding any type of additive to diesel fuel, as they can provide guidance based on the specific make, model, and age of the vehicle or equipment in question.
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Engine performance
The practice of adding ATF to diesel fuel is not recommended for modern diesel engines, as it can cause long-term damage. However, some people still do it, especially with older diesel engines, as it can help with engine performance and fuel efficiency.
ATF, or Automatic Transmission Fluid, is not intended to be used as a fuel. Modern ATF is designed not to burn and will leave ash deposits in the engine, which can cause extreme wear on injection systems. These deposits are made up of long chains of hydrocarbons, which will not burn cleanly and will build up over time. This can lead to potential engine failure and costly repairs.
However, some people still add ATF to their diesel fuel, especially in older diesel engines. Some claim that it helps clean the injectors and the fuel system, improving performance and fuel efficiency. It is recommended to use only a small amount of ATF, such as one quart per every 20 gallons of diesel fuel, or even less. Some people also recommend using the cheapest ATF available, as it is not being used for its intended purpose.
Additionally, ATF can help with fuel lubrication, especially in older diesel engines that may not have adequate lubrication. This can lead to improved engine performance and a smoother running engine.
Despite these potential benefits, the use of ATF in diesel fuel is generally not recommended. The long-term effects of burning ATF are still unknown, and it may cause more problems than it solves, especially in modern diesel engines with higher fuel pressures and different injection systems. There are also concerns about the high levels of sulphur and zinc in ATF, which can cause erosion and poison the engine.
Overall, while some people have found success in using ATF in their diesel fuel, especially in older engines, it is not a widely accepted practice and may cause more harm than good in the long run. It is always recommended to use diesel fuel additives that are specifically designed for modern diesel engines.
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Fuel pump longevity
While some people claim that adding ATF to diesel fuel can improve pump and injector longevity, there are several reasons why this might not be a good idea. Firstly, ATF is red in colour and turning your fuel red might be hard to explain if you ever get dipped. Secondly, ATF contains friction modifiers meant for clutch paks in transmissions, not for injection pumps with tight tolerances. Modern diesel injection pumps operate under much higher pressures and are made from different materials, so ATF can cause more problems than it solves.
In addition, using ATF as a fuel supplement in common-rail fuel systems may cause premature component wear and compromise the integrity of the fuel system. ATF can also leave ash deposits behind, and its long-term effects on fuel systems are unknown. While some people claim that ATF improves their engine's performance and fuel economy, others have experienced issues with their injectors.
If you are looking to improve the longevity of your fuel pump, there are alternative additives that are specifically designed for diesel engines. Biodiesel, for example, can be used without voiding the warranty on your truck. Other alternatives include fuel additives, which can improve lubrication, clean, and add cetane. However, it is important to use additives that are designed for the purpose, as some additives found in garages (such as ATF, motor oil, and hydraulic fluid) can be harmful to modern diesel engines.
In conclusion, while ATF may have been used in the past to improve fuel pump longevity, it is not recommended for modern diesel engines due to the potential for adverse effects. It is best to use additives that are specifically designed for diesel engines and to follow the manufacturer's recommendations for fuel and additive use.
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Frequently asked questions
While some people claim that adding ATF to diesel fuel can improve pump and injector longevity, clean the inside of the engine, and increase mileage, it is not recommended. Modern diesel injection pumps operate under much higher pressures and older methods are not suitable.
ATF stands for Automatic Transmission Fluid.
Some people believe that adding ATF to diesel fuel can help clean and lubricate the injectors and valves, improving the performance of the engine.
Yes, there are several alternatives to ATF that can be used in diesel fuel. Some people recommend using additives designed for modern diesel engines, such as Howes, Lucas, FPPF, or Power Service. Others suggest using Marvel Mystery Oil, which is a light lubricating oil with a wintergreen fragrance.
Yes, there are potential risks associated with adding ATF to diesel fuel. ATF contains friction modifiers meant for clutch packs, not injection pumps. It also contains sulphur and zinc, which can be harmful to the engine. Additionally, ATF can cause issues with modern diesel injection pumps and void warranties.
