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waste oil

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Old 08-21-2008, 11:19 AM
jgc2521 jgc2521 is offline
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waste oil

Ok, i've heard people say 'don't do it' before, but a guy i know is taking waste oil and sending it through many filters (i'd say 7), and then heating the oil up, mixing it with diesel, and sending it through a centrifuge... he ran it in an old cummins for a while and nothing went wrong, besides the smell of burning oil.

he runs it in the backhoe, and now his truck...

what's y'alls take on this


now i dont want any bashing, just opinions, remember it isn't me doign this
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Old 08-21-2008, 12:07 PM
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fabmandelux fabmandelux is offline
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To avoid the inevitable debate just do a search of this forum. This has been hashed out in the forum for years.................
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Old 08-21-2008, 12:11 PM
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It is very risky to run waste motor oil.
Diluting it will reduce but not eliminate the risk.

Waste motor oil has a considerable load of submicron (smaller than one micron) particles in suspension. It is these particles that give used oil its black color. If you can restore the oil to its original color, by filtration, you can assume you have removed all of the particulate cantaminates; however, you have not addressed the chemical by products of combustion, most of which are acidic in nature and can attack metal parts in the fuel system.
The more sophisticated your diesel engine is the more likely the acids and submicron particles are to do damage, the old cummins and possibly the backhoe may tolerate the contaminated fuel while his truck, if one of the newer engines, most likely won't. Damage may take time to accumulate to the point of being a problem but at that point may be irreversible.
I will not run WMO in any concentration in my truck. I am not willing to gamble my $10,000 engine to save a few bucks on fuel.

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Ratz Don beat me to it but he is right
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Old 08-21-2008, 10:03 PM
jgc2521 jgc2521 is offline
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i was thinking the same thing in my head, (and had read it on her before) i just wasn't sure if the filtering down to 1 micron cleaned it enough or not...

but yeah, i just posted to confirm my suspicion
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