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Mercedes bluetech diesel's dirty little secret

by punterjoe / November 19, 2006 10:15 PM PST

I just heard you mention the new Mercedes diesel on Gadgettes. I caught the same piece referenced on public radio's 'Marketplace' program. They also touched on what makes the bluetech diesel so clean. It's ...er "secret ingredient". Worst of all, it isn't a new fuel you can buy at special pumps, but an additive that has to be stored separately and injected at the moment of combustion. I've been stepping around the issue too long. I guess I just have to get it out in the open... the key to the new clean diesel is ...urea. Yeah, it's exactly what you think it is.
Apparently when these new diesels run out of urea they become dirty old diesels. The tasteless jokes and puns are too numerous to go near so I'll let everyone come up with their own. I guess that's a long trend in technological innovation, we don't want to see where our food comes from and now we don't want to know what we're pumping into our cars. Oh well, at least they can bill it as 'all organic' Silly

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eeeewwwwwww....well...
by shawnlin / November 20, 2006 5:42 AM PST

NASA is coming up with ways to recycle waste water of all types to make potable water.

I suppose Mercedes has create a "partially closed loop" system in using a waste product for something usefull.

And, if you've ever seen "Blues Brothers" there's mention of the band being soo amazing that "back in the day" they could turn "goat piss into gasoline!"

hmmm...I wonder if that's where the idea came from?...

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oh boy
by steamburn / November 30, 2006 12:57 PM PST
In reply to: eeeewwwwwww....well...

Judging by your childlish and squeamish comments, neither of you knows where that urea is coming from. True, urine (there, I said it) contains trace ammounts of urea, but like most other industrial chemicals, urea is synthesized in a commercial process in huge quantities. I worked in a urea plant and no I didn't spend my days whizzing into a huge vat you'll be comforted to know. Urea is produced from ammonia (made from natural gas and air) and good ol' carbon dioxide. So stop worrying about pee-fueled benz's stinking up your block, urea forms solid, white, odourless, water soluble "prills" that have never seen a bladder, unless you pee (tee hee) on them yourself.

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(NT) :o) thanks for the entertaining explaination!
by shawnlin / December 1, 2006 3:53 AM PST
In reply to: oh boy
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Urea is a common ingredient in personal care products.....
by Placidair / December 22, 2007 8:53 AM PST

Next time you apply hand lotion.... take a gander at the ingredient list .... chances are very high that urea is in there. It's in a lot of things you've probably been smearing all over yourself for years.

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Make for himself...
by KioChance / March 10, 2009 6:02 PM PDT
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i just passed 10k miles in my ml 320 bluetech
by jashsf / December 8, 2009 3:46 AM PST

i had plenty of warnings and opportunity to know that i had to return to the dealer for the additive to make sure i kept running my diesel in a clean and proper way. i see no problem with this and am quite proud to be helping reduce my own foot print, well below that of the hybrids.

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urea change
by reigndear / December 9, 2009 5:36 AM PST

Hell can I just piss in my car? Seriously though I have to go back to the dealer for an oil change, a urea change is fine... lol

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