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  #46  
Old 06-16-2008, 02:54 AM
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Originally Posted by gsxr View Post
Running used motor oil, filtered or not, in your fuel tank in large quantities is not necessarily a good thing to do. At least not to a car you care about. I have a VW Dasher Diesel beater that I wouldn't think twice about feeding used/filtered oil as fuel, but I'd never put it in my MB. There are fine particles that you can't filter out, which don't do nice things to injection pumps and injectors at 2000psi. It's up to you, though. BTW, I think re-using the 9-hour Delo in your crankcase is fantastic!
What about a thermo depolymerization process. I am currently running wste motor oil as a testing and it works well though plugs my filter after 100 miles or so. I was told you could break down the carbon build up and polymeres through this process.

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  #47  
Old 06-16-2008, 10:24 AM
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Originally Posted by lc007 View Post
What about a thermo depolymerization process. I am currently running wste motor oil as a testing and it works well though plugs my filter after 100 miles or so. I was told you could break down the carbon build up and polymeres through this process.
The fact that your filter plugs in about 100 miles should tell you a lot. There are commercial heaters that are designed to burn waste oil, generally a furnace of some sort used to heat a workshop or other good-size building. But your MB diesel just wasn't made to burn used motor oil (or ATF). I really have no idea if messing with the polymers will reduce your filter plugging or not, but as I said in my last post, I wouldn't do this on a car you care about...

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  #48  
Old 06-16-2008, 06:10 PM
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gsxr,

WHat is 9-hour Delo?

P E H
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  #49  
Old 06-16-2008, 06:13 PM
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Originally Posted by P.E.Haiges View Post
gsxr,

WHat is 9-hour Delo?

P E H
The oil the OP was wanting to burn that had only 9 hours of use in a Caterpillar generator. He was saying oil with 9-hours of use is still good to use in the engine.
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  #50  
Old 06-16-2008, 06:39 PM
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Originally Posted by grantdcol View Post
- Waste Vegatable oil comes from plants, which produce O2 as they grow, making carbon neutral as a fuel
- Engine Oil comes from petroleum, so the CO2 byproduct is not offset
Horse. Poo. Everything is "carbon neutral" where do you think petroleum comes from?

OM Oel Motor. Rudolf Diesel designed his engine to run on Peanut oil. Diesel came later. B100 is just fine. SVO when heated to 180+ and done right is probably ok as well but you wont catch me doing it (soy is $7 a gal now?).
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  #51  
Old 06-16-2008, 06:46 PM
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Rudolf Diesel designed his engine to run on Peanut oil.
But Rudolf didn't work at Mercedes did he?
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  #52  
Old 06-16-2008, 06:57 PM
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No, effectively VW.....

I'd rather run raw peanut oil over used petro oil.
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  #53  
Old 09-27-2010, 10:15 AM
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I think folks should do what they want. It is their vehicle after all! Besides, a lot of good data good be realized if folks who are running alternative fuels regularly reported their results (both positive and negative). I simply do not like folks who are quick to put down others ideas right off the bat.

You don't like my opinion....sue me. You want this post to be an infraction, knock yourself out!
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  #54  
Old 09-27-2010, 10:30 AM
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Ah the dad contaminated my supply of used oil with antifreeze. I'm still deciding what I'm going to do with that.
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  #55  
Old 09-27-2010, 10:37 AM
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Originally Posted by psaboic View Post
I think folks should do what they want. It is their vehicle after all! Besides, a lot of good data good be realized if folks who are running alternative fuels regularly reported their results (both positive and negative). I simply do not like folks who are quick to put down others ideas right off the bat.

You don't like my opinion....sue me. You want this post to be an infraction, knock yourself out!
I agree that individuals should do what they want, as long as they are willing to deal with the legal and mechanical consequences (and as long I don't end up buying their used engine/car). I also believe that anyone caught running untaxed fuel on the road should pay a very painful fine.
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  #56  
Old 09-27-2010, 02:30 PM
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Originally Posted by psaboic View Post
I think folks should do what they want. It is their vehicle after all! Besides, a lot of good data good be realized if folks who are running alternative fuels regularly reported their results (both positive and negative). I simply do not like folks who are quick to put down others ideas right off the bat.

You don't like my opinion....sue me. You want this post to be an infraction, knock yourself out!
I agree...It would be one thing if they had actually done it before and had some knowledge from the experience to share. However, most that turn their noses up at the idea have never even tried it.

I have been collecting used motor oil everytime I service a big rig at work.(I am a Heavy Duty Truck/Diesel Tech). I am working on making a filtering system and will soon be experimenting running different percentages of a UMO/diesel mix. I realize there may be some consequences but thats OK. If it proves to be bad, I will than know for myself. I figure there's not much to lose considering I will be running it in a $500 car...the savings will pay for the car in NO time and after that its money in my pocket. If the injection pump eventually fails than I can use the money I saved on fuel to have it rebuilt. The money saved may justify having to rebuild the pump depending on how often it would need to be done. So at the worst I may break even, but hey, at least its keeping some money out of the BIG oil industry's pockets and thats what I enjoy most about it!!!
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  #57  
Old 09-27-2010, 03:53 PM
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Boy, did this post get a lot of attention. Some things to consider: 1- Used internal combustion motor oil is considered a listed hazardous waste by EPA. As such, significant penalties may apply to improper disposal. (Although I seriously doubt the EPA would spend time on such a small amount.) 2- EPA requires disposal through specially liscensed and inspected facilities. 3- Many of these facilities will burn the used oil for heat, such as making cement. The exhaust gas is sampled and monitored, and the facilities are located away from population centers. 4- The used oil WILL contain micron and sub-micron size particles which may combine in an engine with unburned hydrocarbons to produce heavy metal pollutants that cause disease in people and animals. Even the best filter cannot cannot remove sub-micron particles!

Why not have them save all of the used oil from the generators for you, and sell it to an oil recycler (currently paying $1.00+ per gallon). They can filter and re-distill the oil to make other products, and you will have enough money to fill your tank with #2 diesel at least twice. Everybody will be happy.
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  #58  
Old 09-27-2010, 05:41 PM
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Originally Posted by nomorehurry View Post
Boy, did this post get a lot of attention. Some things to consider: 1- Used internal combustion motor oil is considered a listed hazardous waste by EPA. As such, significant penalties may apply to improper disposal. (Although I seriously doubt the EPA would spend time on such a small amount.) 2- EPA requires disposal through specially liscensed and inspected facilities. 3- Many of these facilities will burn the used oil for heat, such as making cement. The exhaust gas is sampled and monitored, and the facilities are located away from population centers. 4- The used oil WILL contain micron and sub-micron size particles which may combine in an engine with unburned hydrocarbons to produce heavy metal pollutants that cause disease in people and animals. Even the best filter cannot cannot remove sub-micron particles!

Why not have them save all of the used oil from the generators for you, and sell it to an oil recycler (currently paying $1.00+ per gallon). They can filter and re-distill the oil to make other products, and you will have enough money to fill your tank with #2 diesel at least twice. Everybody will be happy.
Exhaust fumes from burning ANY kind of fuel are harmful....I don't think anyone plans on taking a drag off their tailpipe!!
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  #59  
Old 09-27-2010, 05:47 PM
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Originally Posted by gsxr View Post
Thing is, Cummins and MB diesel are different designs (direct injection vs. indirect, etc), different injection pumps, etc and they don't mention the dilution rate. Small amounts over time should be less of a problem, but there was one guy here who wanted to run gallons of it per tank.
I think that the group has hit on the important point: how much/tank are you using?

The oil may be great, but I wonder about the additives to the motor which may not always be appropriate fo burning.

Example: In the old days (1950s) even Mercedes allowed people to cut their diesel in the winter with 7% gasoline. Then they revised it: any gas except premium, because gewrman premium contained vanadium, and it caused some kind of raction-- I am still trying to chase the whole story down on that.

I see NO problem using used, filtered oil in SMALL proportions and if oil is still good, per the analysis, why not use it?

You have to admit though, that the Cummins engines are a little stouter than our 616-617 family, in this case.
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  #60  
Old 09-27-2010, 06:26 PM
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Well here are some other thoughts....

The only way to use used motor oil in a manner that is safe for the engine would be to run it through a fractionation process again. That would get rid of the metal particulate content and soot.

If someone wanted to hire a lawyer they could make a couple of arguments in court (Not that a judge would buy it).

For legal purposes road tax wise used motor oil could be considered an additive just like 2 stroke motor oil. Additives are exempt from road taxes. Can anyone find a law that limits the amount of additive that is added to ones tank?

Secondly all internal combustion engines burn a little oil and are certified by the EPA as doing such. If your engine can burn the oil and pass an emissions check your in the clear. Is there any regs on adding additives to your fuel before an emissions check?

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