You need to understand the old "quality vs. quantity" concept in terms of how it applies to engine wear. Would you rather be trampled to death by one raging bull, or swarmed by a hundred thousand ants? Either way you are dead. One just takes longer. Insert soot agglomeration into the equation and speed increases.

Filters run continuously, either in full flow or bypass mode, again it is just a matter of time. You need to define your terms if you want to have a rational argument.

And yes, cellulose-based filter elements do filter "down" to <1um. This has been proven by particle count tests many times over in all sorts of applications from automotive to industrial and everything in between.

 

Once again I'll say it. I would never even think of running used oil in my Cummins. About the only thing I would run used oil in is old Caterpillar engines, like pre-1980. There's no way you can filter absolutely all of the metal filings out and whatever other trash there is in the oil. No matter how much anyone argues, there just isn't filter technology right now that can filter everything 100%. It's that microscopic stuff that is going to take out your pump over time.

 

I would just like to say when crude oil comes out of the ground it has alot of crap in it. Lots and lots of little pieces of abrasive stuff. If it isn't possible to filter small enough then how do we burn diesel we get at the pump and not destroy our diesels? Overal I think the main point is it needs to be processed and filtered well and probly shouldn't be ran in newer diesels. My question is where do you guys get enough waste motor oil to make it all worthwhile? This all takes alot of time and filters and stuff adds up quick. I get maybe 15 gallons a year if I save all the ATF, Motor oil, Power steering fluid, gear oil, and any other petroleum based stuff. Thats 60 bucks worth of fuel. Not even close to all the work and money needed to make it worthwhile.

 

Some people might even be surprised at what they can find in supposedly virgin, new motor oil.

 

I'm getting tired of hearing if, why and what.
Let me scan some pictures with damages and detailed descriptions.
The problem is not new- dilluting diesel with wmo is done in africa a long time- with fatal engine damages.
After watching that you can make your own decisions to risk it or to stay away from it.

I think this is a very good way to bring some detailed facts into the discussion, right?

 

All damages of the following pictures are caused by waste motor oil!

Additives in engine oil caused a sticky surface- the movement was difficult and was followed by a burned off injector tip.



Dilluted fuel caused again a sticky surface at the injector needles. Combustion gasses were able to enter the needle seatings. The needle is clearly burned of. Visible by the dark color. You also can see the clearly visible wear marks caused by the abrasive soot particles.



interior pump roll damage caused by soot particles.



wear caused by waste motor oil after a couple of thousand hours. Usually this part does not wear out.



same damage, different plunger-
caused problem: pumping fuel volume is decreased, significant power and torque loss.



Break trough in the needle seating(arrow), significantly worn by wmo



worn needle by wmo.



So called trumpets, caused by soot. This delivers a completely disturbed spray pattern. Overspray ruins the combustion chamber due to oil wash off. Loss of power, dripping needles.




As you can see filtration will not help- sadly soot and therefore abrasive particles will pass- even with fine filtration down to 2 microns.

Source: A book I found during tribologie practise in a company. Showing engine damages and their causes. The use of WMO is widely spread in africa, due to the fuel costs and saving money. The damages shown here all caused heavy engine damages.

I really do hope to bring the discussion into motion and to give an educated view about the thread. It is all up to yours.

 

i will still run it. i know what i get so i am not worried. been runnin it for a while. no problems at all.... i filter to 1 micron too...

 

 

i know when i replaced my injectors in my LB7 they very clean and showed hardly any deposits on them. looked liked i ran nothing but diesel. i also pulled my CP3 pump and took it apart to inspect it and drill out some holes for improved flow. no scoring or signs of where that i could tell. the pump pistons had a mirror finish on them and where a very smooth & tight fit.

sorry no photos but this is just my experience. i don't have the greatest filter setup but i do thin my WMO with gasoline so it pumps and atomizes correctly. also most of my oil is from gassers but i don't hesitate to use oil from diesels

 

see what i dont get is , if the oil is so horrible why is it ok to run it through your bearings and cylinder walls for billions of engine rotations? i know the tolerances in the pump are tighter and all that but come on...and its kind of a hard sell for me to say ,well starving 3rd world africans destroyed their injectors with used oil filtered through a goat hide, so therefore my upflow processor and cimtek filters are inadequate...