Ameer Randolph
Getting free diesel fuel is possible, but it requires time, resources, and modifications to your vehicle. One way to obtain free diesel fuel is by collecting and filtering waste vegetable oil from restaurants. This method requires a significant investment in time and resources to set up a portable filtration system, and not all vehicles are suitable for running on vegetable oil. Some older vehicles with injection systems that aren't totally reliant on fuel for cooling, such as the 94-98 Dodge Cummins or 7.3 Ford Powerstroke, are better suited for this. Additionally, it is important to properly filter the vegetable oil and test it for contaminants. Resources such as the Bio Fuels Technology forum and websites like vegoilcar.com offer valuable information on the process. Another option for obtaining free fuel is through competitions, such as the one offered by Sasol and Checkers Xtra Savings, where participants can win free fuel for a year.
Characteristics and Values Table for Getting Free Diesel Fuel
| Characteristics | Values |
|---|---|
| Fuel Type | Vegetable Oil (WVO), Straight Vegetable Oil (SVO), Waste Vegetable Oil (filter WVO) |
| Vehicle Type | 94-98 Dodge Cummins, 7.3 Ford Powerstroke, 12-valve Cummins, pre-common rail engines, old injection pump diesel |
| Engine Type | Engines with injection systems that aren't totally reliant on fuel for cooling |
| Fuel System | Two-tank system: start on diesel, switch to vegetable oil, switch back to diesel near the destination |
| Resources | vegoilcar.com, Bio Fuels Technology (Vegistroke and VegiRam) forum |
| Considerations | Time, space, connection with restaurants for oil collection, filtering equipment, vehicle modifications |
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What You'll Learn
Filter and use vegetable oil
Using vegetable oil as diesel fuel, also known as Straight Vegetable Oil (SVO) or pure plant oil (PPO), requires certain modifications to your vehicle and a filtration process for the oil.
Firstly, you will need to source your vegetable oil. Used vegetable oil, also known as Waste Vegetable Oil (WVO), can be sourced from restaurants, which often have large quantities that would otherwise be thrown away. However, this oil is likely to be mixed with other substances, such as burnt food, and may be rancid.
To filter the oil, one method is to first let it settle for about a week, allowing fatty solids to sink to the bottom. You can then pour the clear oil from the top and filter it. This initial settling step is important, as skipping it will quickly clog your filters. Another filtration method involves using a centrifuge filter, which spins the oil to separate solids, allowing for faster filtration.
Once you have filtered your vegetable oil, you can use it as fuel. However, you will need to make some alterations to your vehicle. Most diesel car engines can be modified to use SVO/PPO, but the viscosity and surface tension of the oil must be reduced by preheating it. This can be done by adding a heat exchanger and an additional fuel tank for a petrodiesel or biodiesel blend, switching between this and your main tank of SVO/PPO. You will also need to add fuel selector valves and toggle switches to switch between fuel tanks. Additionally, you will need extra fuel and coolant lines and an extra fuel filter for the vegetable oil.
It is important to note that you should always start your vehicle on diesel fuel and only switch to vegetable oil once the engine is warmed up. Before turning off your vehicle, switch back to diesel to ensure no vegetable oil remains in the engine or fuel lines when you next start the vehicle. This process will help prevent issues such as incomplete combustion and carbonization.
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Run a two-tank system
Running a two-tank system is a simple and effective way to safely run a diesel engine on vegetable oil. This method is also known as a twin-tank or bi-fuel system. The engine is initially started on diesel fuel or another starting fuel, and once the engine is warm, the fuel supply is switched to vegetable oil. Before shutting down for an extended period, the fuel supply is switched back to diesel, and the engine is allowed to run for a few minutes to flush out the vegetable oil.
There are a few things to consider when setting up a two-tank system. Firstly, the fuel lines from the diesel tank should run to the valve that allows switching between tanks. Similarly, fuel lines from the vegetable oil tank should run to a new filter and then to the valve. A heater should be installed near the fuel injectors to ensure the oil is hot before entering the engine. Return lines can be added to return any unused diesel to the diesel tank.
It is important to note that having vegetable oil returned to the diesel tank is not advisable as it can cause issues due to the presence of unheated plant oils. However, having diesel in the vegetable oil tank is not an issue as it improves the performance of the vegetable oil. A three-way valve in the return line helps direct fuels to the appropriate tank.
Additionally, a buzzer can be installed to alert the driver if the vehicle is turned off while still set to vegetable oil. This reminder is crucial as the vehicle may not start next time if the fuel lines are not purged of vegetable oil.
Overall, a two-tank system offers the advantage of mixing warmed fuel with incoming fuel, improving combustion and reducing the workload on the transfer pump.
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Use SVO when hot
Straight vegetable oil (SVO) can be used as a diesel substitute. SVO is any vegetable oil that can power diesel engines but has not been optimized for usage in automobile fuel systems under all temperature conditions.
SVO produces extremely low emissions and can be obtained for free from restaurants, where it is known as Waste Vegetable Oil (WVO). WVO must be filtered before use as it contains food particles. However, the major drawback of using SVO is that it gels at colder temperatures and must be heated before reaching the engine's fuel injectors.
To use SVO, you can add a heat exchanger and an additional fuel tank for diesel. Start the engine on diesel, switch over to SVO once the engine is warmed up, and then switch back to diesel before turning off the engine. This ensures that no SVO remains in the engine or fuel lines when the engine is started from cold again.
SVO is suitable for use in most diesel car engines with certain modifications. Engines with injection systems that are not totally reliant on fuel for cooling, such as older injection pump diesels, are better suited for SVO. It is important to note that SVO may not be suitable for common rail engines as they are more sensitive to fuel quality.
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Use a portable filtration setup
One way to get free diesel fuel is to collect and filter vegetable oil from restaurants. However, this method requires significant modifications to your vehicle, as well as time, energy, and space to collect and filter the oil. You will also need to connect with restaurants and establish a system for collecting the oil. This method may not be suitable for all vehicles, especially those with common rail engines that are sensitive to fuel quality.
To address the issue of fuel quality, you can use a portable filtration setup to purify the vegetable oil before using it in your vehicle. This involves investing in a portable fuel polishing system, such as those offered by Dieselcraft. Their system uses proprietary filter-less purifier technology to remove 99% of water and solid contaminants from the fuel before it reaches the filters. This reduces the need for frequent filter replacements and saves you time and money.
The Dieselcraft portable fuel polishing system includes several features that make it a convenient and effective solution for filtering vegetable oil. It comes with a 115-volt motor and a 7 GPM pump, as well as a water/debris alarm that indicates when the purifier needs to be drained. The system also includes magnetic fuel conditioning to fight bacteria in the fuel and dual filtration, allowing for continuous operation without stopping to change filters.
In addition to the Dieselcraft system, there are other portable filtration options available on the market, such as the Parker DFC Portable Diesel Fuel Filtration Cart. This system is designed to remove harmful contaminants from diesel and biodiesel fuels, ensuring optimum engine performance and extending the life of fuel injection systems. It is a practical and economical maintenance tool that can be used before fuel use and after long periods of fuel storage.
By combining the collection of vegetable oil from restaurants with the use of a portable filtration setup, you can potentially obtain free diesel fuel for your vehicle. However, it is important to carefully consider the time, resources, and vehicle compatibility required for this method and ensure that you have the necessary space and equipment to collect, filter, and store the fuel.
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Use a waste oil test for contaminants
One way to get free diesel fuel is to use vegetable oil from restaurants. However, this method requires modifications to your vehicle, as well as time and energy to collect and filter the oil. You will also need to have space for all the filtering equipment and be okay with the smell of used fry oil.
If you decide to go down this route, it is important to test any waste oil for contaminants before using it as fuel. Contaminants in the oil can cause excessive wear on vehicle components and lead to costly repairs. Here are some ways to test for contaminants:
ICP Spectroscopy
Inductively-coupled plasma (ICP) spectroscopy can detect wear, contaminant, and additive elements present in the oil. The process involves ionizing the sample and using a mass spectrometer to measure levels of concentration. ICP can identify concentrations of silicon and aluminum, which are typically indicative of dust and dirt contamination.
FTIR (Fourier Transform Infrared Spectrometry)
FTIR can be used to detect the presence of water in the oil, which is the second most common contaminant. Water ingression can be caused by bad seals, system vents, condensation, or a contaminated new oil supply. The presence of water can also be detected by a "crackle" test, and its quantity can be determined by the Karl Fisher titration method, reported in parts per million (ppm).
Gas Chromatography
Gas chromatography (GC) is a process that separates a mixture by vaporizing the sample and measuring each component released. It is the most accurate method for testing fuel dilution, which occurs when unburned diesel fuel makes its way past the rings and into the engine oil. Fuel dilution can decrease oil viscosity and lubricity, increasing bearing wear and the potential for failure.
By testing waste oil for contaminants using these methods, you can help ensure that the oil is safe to use as diesel fuel and minimize the risk of damage to your vehicle's engine and components.
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Frequently asked questions
One way to get free diesel fuel is to collect and filter vegetable oil from restaurants and use it as your fuel source.
You will need to install a portable filtration setup, which can be placed in the back of a pickup truck or trailer, depending on space availability.
Older vehicles with injection systems are recommended, such as a 94-98 Dodge Cummins or 7.3 Ford Powerstroke. Newer common rail engines are more sensitive to fuel quality and may not be suitable for vegetable oil.
It is recommended to use a 2-tank system. Start with diesel to warm up the engine, then switch to vegetable oil. Before reaching your destination, switch back to diesel to clear the fuel lines.
Yes, websites like vegoilcar.com offer videos and write-ups on filtering vegetable oil for use as diesel fuel. Additionally, the Bio Fuels Technology forum, which includes discussions on products like Vegistroke and VegiRam, is a valuable resource for information on the topic.
