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  #16  
Old 10-10-2008, 10:30 AM
rrgrassi's Avatar
mmmmmm Diesel...
 
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Quote:
Originally Posted by CoffeeGuy View Post
Sounds like you should definitely not run it straight, however after an oil change if you filter it, (I think a t-shirt is not the best idea) through a really fine filter, probably let it settle for a day or two to let the heavy particles settle to the bottom of your container. Then siphon off the top and pour that into a full tank of Low Sulfur Diesel (LSD for our engines) it will help with lubrication and be a great way to recycle used engine oil. Since I am using Mobil 1 full synthetic, I can get a little of my money out of it.

Anyone know what kind of filter would get the most contaminates out of the oil?

Any opinions on that conclusion?
Motor oil is designed to suspend particles. A t-shirt will not filter out the suspended particles very well. You would need a centrifuge.

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70's Southern Pacific #5608 Fairmont A-4 MOW car

13 VW JSW 2.0 TDI 193K, Tuned with DPF and EGR Delete.

91 W124 300D Turbo replaced, Pressure W/G actuator installed. 210K

90 Dodge D250 5.9 Cummins/5 speed. 400K
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  #17  
Old 10-17-2008, 09:19 AM
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Agreed a t-shirt would not work. The main particles to remove would be metal; the rest would burn off during combustion. So without the expense of a centrifuge is there a fine enough filter out there to remove the metal particulate left in the oil.

Do you think under the right conditions i.e. a properly tuned MB 3.0 liter Diesel using Mobil 1 Synthetic, changed at 4,000 miles, driven under normal conditions, that the used oil would need anything more than a run through a very fine Fuel filter?

I do not think that used oil is a replacement for good ole diesel; I am really trying to figure out if it can safely be recycled in the fuel and burned as a “fuel additive” for helping the “lubrication properties” of “LSD”, and also as a way of getting rid of a waste product. I have 4 vehicles, I do all my oil changes, and this weekend will be dropping off about 5 gallons (20 quarts) of used oil at autoreillyadvancedMcParts. Having to do this every 3 to 4 months, equals a lot of waste oil, it would be nice if I could recycle it and get some use out of it.

Thoughts?

I know, I will by a cheap small diesel engine from ebay, convert my lawnmower to diesel and burn all of my used motor oil through that, the neighbors should love that pleasant odor.
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  #18  
Old 10-17-2008, 10:04 AM
rrgrassi's Avatar
mmmmmm Diesel...
 
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Not unless you could refine it into actual diesel. I do not know where in the oil refining chain that diesel and motor oil split off or come together.

Someone who knows should chime it.

I have no problem in burning used oil in things made to do so. Heaters are one thing that you can get. I do know that the tourist steam locomotives that are oil burners do burn used motor oil.

Diesel lawn mower...hmmm...well there are plenty of g@ssers on the road that burn so much oil that they think they are a true diesel...and they actually PASS emissions testing. I do not get that one.
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70's Southern Pacific #5608 Fairmont A-4 MOW car

13 VW JSW 2.0 TDI 193K, Tuned with DPF and EGR Delete.

91 W124 300D Turbo replaced, Pressure W/G actuator installed. 210K

90 Dodge D250 5.9 Cummins/5 speed. 400K
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  #19  
Old 10-17-2008, 11:06 AM
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Quote:
Originally Posted by Diesel911 View Post
Do an internet search for Bunker C. This is a fuel that is or was used in the big Diesel Main engine type ships.
In trade school they told us that Bunker C was not to far away from being just plain Crude Oil and that on the ship you need to heat the Bunker C to lower the viscosity and filter it well before it went into the fuel injectin system.
Also known as "black oil", its pumped aboard the "bunkering" (fueling) barge or directly aboard the STEAM ship hot, otherwise it would be way too thick. Definitely not fuel for a diesel.
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1985 Euro 240D 5 spd 140K
1979 240D 5 spd, 40K on engine rebuild
1994 Dodge/Cummins, 5 spd, 121K
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Last edited by Stevo; 10-17-2008 at 11:56 AM.
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  #20  
Old 10-17-2008, 11:27 AM
firemediceric's Avatar
1981 300 SD
 
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Quote:
Originally Posted by CoffeeGuy View Post
[Do you think under the right conditions i.e. a properly tuned MB 3.0 liter Diesel using Mobil 1 Synthetic, changed at 4,000 miles, driven under normal conditions, that the used oil would need anything more than a run through a very fine Fuel filter]
Even the guys that profess to have good results burning UMO say to stay away from the synthetic stuff. They relate that the synthetic becomes stringy and does not blend well, although I have no first hand experience.

There has been a lot of discussion about this in the Alternative Fuels section of The Diesel Stop
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  #21  
Old 10-17-2008, 03:41 PM
ForcedInduction
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Quote:
Originally Posted by CoffeeGuy View Post
the rest would burn off during combustion.
Thats assuming the additives designed to help prevent the oil from burning will actually burn cleanly when injected.

Quote:
Diesel using Mobil 1 Synthetic,...that the used oil would need anything more than a run through a very fine Fuel filter?
Dino oil is one thing but synthetic wouldn't burn well at all.
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  #22  
Old 10-17-2008, 04:02 PM
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Use it for heating oil. Just get a waste oil heating unit.

It is not suitable for use in any street diesel, or any off road either.
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  #23  
Old 10-18-2008, 01:45 AM
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I wouldn't touch that stuff. Not because it won't work (I've run my diesel benz on straight motor oil before), but because it's not a good idea. It's pretty close to what ships run (as has been pointed out), and they have (again, as pointed out) gigantic separator units. Light fuel oil doesn't have to be heated, making it the fuel of choice, but this is closer to heavy fuel oil - the nightmare of the engine room. Oh, and since this is intended for used motor oil... how do you plan to manage contaminants? There will be some metals (again, already been pointed out), both ferrous and non-ferrous, as well as potentially other chemicals. You'll have to collect used motor oil, and who knows what is mixed into that?

Just spend the money on routine maintenance and a couple small upgrades... better to spend a little more keeping the car in top condition (and at peak efficiency) than to invest is a potentially nightmarish 'alternative' fuel to save a few pennies... your bank account will thank you in the long run.
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  #24  
Old 10-18-2008, 01:13 PM
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Diesel powered ships use the same fuel your MB uses, Steam ships use "bunker C/black oil" which would turn to tar if not heated. Used motor oil has no relation to any kind of fuel ships use.
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1985 Euro 240D 5 spd 140K
1979 240D 5 spd, 40K on engine rebuild
1994 Dodge/Cummins, 5 spd, 121K
1964 Allice Chalmers D15 tractor
2014 Kubota L3800 tractor
1964 VW bug

"Lifes too short to drive a boring car"
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  #25  
Old 10-18-2008, 07:39 PM
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Thumbs down I won't even...

I won't even think of using used motor oil OR especially used transmission fluid.

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