Sylvie Willis
With the price of fuel being so high, it's no surprise that people are looking for alternative fuels. One option that has been discussed online is mixing used motor oil with diesel fuel. This approach has been considered for economic and environmental reasons, but it is not without its drawbacks. The process involves collecting used motor oil, filtering it, and then blending it with diesel fuel, with some heating and settling steps in between. While this may seem like a good way to reuse waste oil, there are concerns about the impact on engines, the environment, and the potential for increased costs due to engine damage. So, can you mix used motor oil with diesel fuel? The answer is complex and depends on a variety of factors, including the type of engine, the quality of filtration, and the percentage of oil in the mixture.
Characteristics and values of mixing used motor oil with diesel fuel
| Characteristics | Values |
|---|---|
| Feasibility | Possible, but may require a lot of processing and blending with gasoline first |
| Cost | Could save money, but may require expensive equipment |
| Mileage and performance | No change expected, but may depend on the engine |
| Maintenance | Likely to require more frequent cleaning of injectors and replacing of fuel filters |
| Environmental impact | May release nasty pollutants into the air |
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What You'll Learn
- Used motor oil can be blended with gasoline first, then mixed with diesel
- Centrifuging used motor oil can make it suitable for diesel engines
- Mixing used motor oil with diesel may damage newer fuel systems
- Used motor oil can be mixed with diesel at a ratio of 60:40
- Used motor oil can cause injectors to coke and clog
Used motor oil can be blended with gasoline first, then mixed with diesel
Used motor oil can be blended with diesel fuel, but it is important to note that there are potential drawbacks and risks associated with this practice. Firstly, it is recommended to blend used motor oil with gasoline first, at a ratio of 10-20% oil to gasoline. This mixture should then be left to settle for 24 hours for waste vegetable oil (WVO) or 3 days for waste motor oil (WMO). After settling, the sludge that accumulates at the bottom should be drained off, and the mixture should be filtered and centrifuged. Only then should it be blended with diesel fuel.
Some people have reported success with this method, claiming that it can result in the same mileage and performance as pure diesel fuel. Additionally, it can be a more economical use of waste products and potentially improve fuel expenses. However, it is important to note that this practice may not be suitable for all engines, particularly newer ones with emissions controls or high-pressure fuel injection systems. There is a risk of damaging fuel systems, injectors, and catalysts, which can result in costly repairs that may outweigh any potential fuel savings.
Furthermore, it is important to consider the environmental impact of burning used motor oil. While some people argue that using waste oil as fuel can minimize environmental impact by reducing waste, others have expressed concern over the pollutants emitted during combustion. It is crucial to research and understand the potential consequences before attempting to use used motor oil as fuel.
When blending used motor oil with diesel, it is recommended to start with a low ratio of oil to diesel, such as 5-10%, to avoid power loss and excessive smoke. Some people have reported success with higher ratios of up to 50% oil to diesel, but this may depend on the specific engine and other factors. It is also important to use appropriate filters to remove contaminants from the oil before mixing it with diesel. Overall, while it is possible to blend used motor oil with diesel fuel, it requires careful consideration of the potential risks, costs, and environmental implications.
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Centrifuging used motor oil can make it suitable for diesel engines
To convert waste motor oil into diesel fuel, you must first heat the oil to distill out the oil gas, then filter out the impurities, and cool the oil gas into a liquid. You can then use a catalyst to degum and deodorize the liquid oil to obtain diesel. If you have high standards for the colour and purity of the diesel, you can use a decolorization system to further decolorize the diesel oil.
There are several companies that offer waste oil centrifuge filtration kits, which can be used to build your own system or a complete "Fuel Factory" system. These systems will remove contamination from any oil, making it ready for use as diesel fuel. The flow rate capacity of these centrifuges is 1 GPM or 60 gallons per hour, meaning one 55-gallon drum of oil will take less than 60 minutes to process.
It is important to note that blending waste motor oil with diesel fuel may not always be a cost-effective solution. While it may seem like a good way to reduce waste and improve fuel expenses, the process requires specialized equipment and can be time-consuming. Additionally, the mileage and performance of the blended fuel may not be the same as that of pure diesel fuel.
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Mixing used motor oil with diesel may damage newer fuel systems
Mixing used motor oil with diesel fuel is a practice that some people employ to save money on fuel and to reuse waste motor oil. While this practice can be successful in older engines, it may damage newer fuel systems.
Some people have reported success in mixing used motor oil with diesel fuel. One person reported that they had seen this done in fleets of vehicles, where the used motor oil is drained and run through a machine that mixes it with diesel fuel from the tank. This mixture is then pumped back into the fuel tank to be burned as fuel. This individual stated that the mixture could be up to 60% fuel and 40% oil. Others have reported using a 50/50 mixture or a blend of 5% to 10% oil.
However, there are potential drawbacks and risks to mixing used motor oil with diesel fuel. One of the main concerns is the impact on the fuel system. Several people have reported that this practice can damage newer fuel systems and injection pumps, particularly in engines that are not fully mechanical. The additives in motor oil can also kill the catalyst and DPF in diesel engines, and the chance of coking and clogging injectors increases with the percentage of motor oil added to the fuel. Additionally, there may be environmental concerns, as burning used motor oil can release nasty pollutants into the air.
Overall, while mixing used motor oil with diesel fuel may be possible in older engines, it is not recommended for newer engines due to the potential for damage to fuel systems and the release of harmful pollutants. It is important to carefully consider the risks and potential costs before attempting to mix used motor oil with diesel fuel.
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Used motor oil can be mixed with diesel at a ratio of 60:40
Mixing used motor oil with diesel fuel is a practice that some people employ to dispose of waste oil while also potentially improving fuel expenses. To mix used motor oil with diesel fuel at a ratio of 60:40, one would first need to collect the used motor oil in a 55-gallon drum. It is recommended to blend waste oil with gasoline first at a ratio of 10-20%, let it settle for 24 hours, and then drain the sludge from the bottom before proceeding with the diesel mixture.
After blending the waste oil with gasoline and letting it settle, the next step is to blend it with diesel fuel. The 60:40 ratio for used motor oil and diesel fuel means 60% of the mixture will be used motor oil, and 40% will be diesel fuel. It is important to note that the blend will burn better in an engine if it is heated first. Additionally, when first using this blend, it is recommended to keep a supply of fuel filters on hand as the detergents in the oil and gasoline will clean the entire fuel system.
The process of creating this blend may require specialized equipment, such as filters and a centrifuge, and it is important to consider the potential impact on the injection system of the vehicle. The mileage and power increases or decreases may vary, and it is essential to take into account the initial costs of purchasing the necessary equipment for handling and processing waste oils into diesel fuel.
While some people have experimented with mixing used motor oil with diesel fuel, it is important to carefully research and understand the potential benefits and drawbacks before implementing this practice. The impact on engine performance, the environment, and the longevity of the vehicle's systems should all be considered when contemplating the use of such blends.
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Used motor oil can cause injectors to coke and clog
While it is possible to mix used motor oil with diesel fuel, there are several factors to consider before doing so. One of the main concerns is the potential impact on fuel injectors. Used motor oil can contain impurities and additives that, when burned in a diesel engine, can lead to the formation of coke and clog fuel injectors.
Coke is a byproduct of incomplete combustion, and it can build up on the injectors, restricting fuel flow and impairing engine performance. Clogged injectors can lead to reduced fuel efficiency, decreased engine power, and, in severe cases, engine malfunction.
The risk of injector coking and clogging is influenced by various factors, including the quality of the used motor oil, the presence of contaminants, and the specific design of the engine and fuel injection system. Some engines may be more susceptible to injector issues when using blends of diesel and used motor oil.
To mitigate the risk of injector problems, it is crucial to properly filter and blend the used motor oil with diesel fuel. Some people who blend their fuels recommend a two-step process: first blending the used motor oil with gasoline at a low ratio (10-20%) and letting the mixture settle for several days before draining off the sludge and filtering. This helps remove impurities and reduces the risk of clogging.
Additionally, regular maintenance and cleaning of fuel injectors are essential. It is recommended to keep a supply of fuel filters on hand when using blends of diesel and used motor oil, as the detergents in the oil can initially cause a higher rate of filter clogging. Proper maintenance can help prevent injector issues and ensure the smooth operation of your engine.
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Frequently asked questions
Yes, it is possible to mix used motor oil with diesel fuel. Some people do this to save money and reduce waste. However, it is important to note that doing so can cause significant damage to your fuel system, and it is not recommended for newer engines.
The process involves collecting used motor oil in a drum, mixing in a small amount of gasoline or another solvent, letting it settle, filtering it, and then blending it with diesel fuel in a transfer tank. It is important to use the correct filters and equipment to ensure that the mixture is safe for your engine.
Yes, there are several risks and drawbacks to consider before mixing used motor oil with diesel fuel. Firstly, used motor oil can contain contaminants that can damage your engine and increase emissions of harmful pollutants. Secondly, the additives in motor oil can negatively affect your engine's injection system and catalytic converter. Finally, while mixing used motor oil with diesel fuel may save you money in the short term, it can lead to increased maintenance and repair costs in the long run.
