WMO Distiller
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Waste motor oil Continuous Distillation.

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WMO   Continuous distillation unit
Colored diesel bleaching

  Continuous distillation unit
(diesel maker).


There is not a secret that many back-yard researchers are trying to build a system that would successfully process waste motor oil into proper usable diesel fuel. Many of them had created a machine of some sort. That could be capable of some diesel-like fuel that, in many cases of questionable quality.

 Not many will risk filling a fuel tank of a modern car with this kind of fuel, and as a result, in most cases, this fuel is entirely for old prehistoric stationary engines that do not care about the sort of fuel they are working on.


 On the other hand, there are many people – “black diesel users” - who try (some claim success) to process the used motor oil through the sets of filters. Add some “secret” ingredients, mix with regular diesel fuel in some proportions and use it as conventional diesel fuel.

WMO to diesel processor

Anyway, while people are searching for the method that will significantly lower their fuel expenses, some problems involve using such fuel. In some countries, the strict rules are in place that would not allow using these kinds of processed fuels, especially black diesel; some engines won’t tolerate these fuels. And despite the simple usage of the “Black diesel,” one will need a set of expensive equipment; the back-yard oil refining machines in most cases are massive. Constructions that may be appropriate for someone who lives on farmland – not for everyone.


Thus the fuel that was produced out of the waste oil must be clear and transparent. The machine should be as small as possible with low maintenance and capable of relatively good processing volumes. The supporting equipment with fuel treatment options must be as simple as possible yet, giving the best possible results. Moreover, any person interested in home fuel production whose hands are growing from the correct place should replicate the oil processing machine in a simple garage environment.

WMO continuous still 

WMO continuous still


Sorry for a long introduction, here I want to introduce a new Continuous distillation machine (Oil Still)

 WMO distillation machine that easy to work with, small and mobile, low maintenance, yet capable of good quality diesel fuel.
The machine is relatively safe compared to giant monsters where people are trying to boil gallons and gallons of motor oil at once - and no one wants to be next to an extremely hot system filled with hundreds of liters of overheated oil.

 During distillation, the processing oil is stored in a separate container. Processing oil is continuously pumping into the reactor of the distiller. Simultaneously, the resulting fuel and waste can also be evacuated from the distiller into the containers via the pipes that are far enough from the still. Thus the system at any present time processing just a fraction of the used oil only about 2.5 - 3L (less than one gallon), and while all safety measures must in place, the 3L of boiling oil is not 300L and even not 10L. The continuous distiller design eliminates overpressure - the reactor has a bypass. As a result, all the reactions happen at atmospheric pressure, while no oxygen can get into the system.

WMO retort



Now let’s list the materials this machine can process into diesel fuel: Motor oils – mineral and synthetic, automatic transmission oil of any kind, industrial mineral oils, transformer oil, hydraulic mineral oils, and mixes of any listed above.

 The distiller can bleach dark diesel fuels, and “red diesel.”

  Currently, I put together a construction manual of a continuous distiller. That will help you to build a real continuous waste motor oil distiller that would be capable of continuously processing used automotive and industrial oils into usable and clean diesel fuel at rates of up to 10L per hour. Moreover, continuous distiller is capable of bleaching dark and dirty diesel-based fuel. It will also remove the dye from the dyed diesel fuel at up to 15L per hour. Thus practically supplying the owner with almost free fuel for a diesel car, diesel generator, diesel heater (burner), or agricultural machinery on your farm. All you need to do is find a supply of used engine oil that some mechanics are having trouble getting rid of.

diesel fuel made out of automatic transmission oil 

A sample of diesel fuel made out of automatic transmission oil with some absorbent at the bottom of the jar.

Thus you will own your crude oil processing mini-factory that will pay for itself in no time. Now, let’s do some calculation – the cost of the manual is yet the US $100.00 

 if second-hand metal from the scrap yard is using, then it could be bought from $20.00 up to $50.00


oil processing still

The cost of 1L of the diesel fuel in Europe is minimum $1.30, and the maximum is $1.75  Thus if you use only 20L of diesel fuel per week – you’ll spend from $1352.00 up to $1820.00 

 And this is a less likely possible minimum; in reality, the overage car owner will double these figures at least, I am not talking about farm machinery and other possible equipment like backup power generators, water pumps, boats and so on – name it.

samples of diesel fuel made out of different waste oils 

Samples of diesel fuel made out of different waste oils

Resulting fuel treatment method.


WMO continuous still

And at the same time, many of us can find a good source of some used automotive oil – motor oil, automatic transmission oil, hydraulic oil at the cost of asking, and some mechanics will be happy to get rid of it. Or maybe you are a motor mechanic, or own the car scrap/removal business and thinking about improving your business output. Instead of having trouble disposing of your collected sump oil – you may turn it into a usable fuel to run your yard machinery and diesel heaters, backup generators. 


The distillery is a low maintenance continuous oil distillation machine that is not a pyrolysis machine. If correctly used, this distiller is capable of good quality fuel that will not be prone to oxidation, will not smell horribly like a pyrolysis fuel, and will ensure a standard engine work.

 Anyway, even at lowest diesel fuel prices, this machine will pay for itself in no time at an overage production rate of 10L per hour it will save you at least $10.00 per hour worth of fuel – remember the crude oil prices are climbing up again so they’ll pull the cost of fuels as well!!!

WMO continuous still

 The machine described in this manual is simple and relatively easy to build by any person who can work with sheet metal and weld a bit. The manual contains all the necessary information to replicate the distiller described in these construction plans. 


The plans are loaded with heaps of step-by-step pictures of the real working still construction, “how to run” and “treatment plant” videos, and some info about how to treat the homemade diesel with absorbent. The distillery is a simple continuous system. Despite the simplicity, it gives excellent results while bleaching colored diesel-based fuels, including red diesel fuel, thus the color can be removed by distillation. This process allows for avoiding unpleasant sulfuric acid and triethanolamine bleaching procedure. The machine can also process pyrolysis liquids, petroleum gas condensates, and capable of processing used automotive and industrial mineral and synthetic oils into usable diesel fuel.

I will be happy to answer all your questions regarding the continuous oil distiller.

To buy WMO continuous distiller (diesel maker) construction plans - click the link below:


WMO continuous distiller's abilities.

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