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Old 04-20-2017, 12:13 PM   #1
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Inquiring minds want to know!

Seems odd that in most European countries most all vehicles are diesel & get great mpg, while here unless you have heavy payloads they are the exception & then choke them down with all sorts of emissions crap. Inquiring minds want to know!
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Old 04-20-2017, 12:29 PM   #2
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Maybe this has something to do with it.
The 2017 Ram 1500 EcoDiesel Is Still Not For Sale, While It's Waiting For Emissions Certification - The Fast Lane Truck
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Old 04-20-2017, 01:12 PM   #3
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Lloyd hit it on the head...Right now diesel emissions seem to always be under the microscope in the US. As far as why there are not more diesel passenger vehicles...No one singular reason but from what I recently read, I would hazard to guess at the core of this conundrum is cost of the fuel after taxation...the fact that Uncle Sam has tax incentives in place on petroleum production and sale that results in diesel carrying a tax around 25% higher than that of gasoline vs European taxing authorities in the reverse taxing gasoline higher. Add that to supply/demand economics in the US and it makes gas more available and cheaper. Of course markets can fluctuate as we've seen the prices of gas to diesel increase and decrease at different rates. Just my opinion, but auto makers have to hedge their bets on what the public wants years in advance and betting on gas vehicle demand is a a no brainer given the tax structures.

Than there is the all powerful sparkplug manufacturing lobby in DC...just kidding.

BTW
I shamelessly stole these stats from a couple sources including an article in the Scientific American. -->https://www.scientificamerican.com/a...n-diesel-cars/
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Old 04-20-2017, 07:18 PM   #4
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Thanks for starting a new thread. Guess you also answered my question, GOVERNMENT!
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Old 04-21-2017, 12:23 AM   #5
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Thanks for starting a new thread. Guess you also answered my question, GOVERNMENT!
What does DEF actually do in a diesel engine...Does it burn.??? Does it help with fuel economy...NO exactly the opposite...
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Old 04-21-2017, 05:11 AM   #6
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Diesel Exhaust Fluid
Ammonia based liquid. Brakes down NOX into simple compounds.
Doesn't effect economy.
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Old 04-21-2017, 10:00 AM   #7
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Diesel Exhaust Fluid
Ammonia based liquid. Brakes down NOX into simple compounds.
Doesn't effect economy.


Yep, Urea and ionized water. Not to get too graphic but essential sterilized urine
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Old 04-21-2017, 11:57 AM   #8
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Sorry, maybe def does not affect mpg specifically, but all the epa crap certainly DOES affect mpg and power...

and imho, how does adding a less volatile liquid NOT affect both mpg and power? I did a quick search for the btu of def, but couldn't find it...

Having ridden around the middle east on motorcycles and wearing full sweater caps/masks pulled down over my face and SEEING the soot that collected on it over my mouth and nose - I can only be SO mad at the epa crap, but they need to 'justify their existence', so they go too far too often.


I do remember driving my first diesels way back when and diesel was always 20 to 30 cents cheaper than gas... not any more
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Old 04-21-2017, 10:50 PM   #9
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Thanks for starting a new thread. Guess you also answered my question, GOVERNMENT!
You nailed it....Government. The 700 pounds of emissions crap bolted on my truck does nothing to help me at all. Thankfully, I live in a non-emissions testing state so the minute my powertrain warranty expires my truck will shed some weight when I delete the DPF, SCR, DEF and EGR.

The latest emissions requirements on diesel trucks does nothing to assist with efficiency, HP, MPG or torque. The only thing it does is eliminate the soot smell and heavy particulates.
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Old 04-22-2017, 08:43 AM   #10
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The latest emissions requirements on diesel trucks does nothing to assist with efficiency, HP, MPG or torque. The only thing it does is eliminate the soot smell and heavy particulates.[/QUOTE]

Emission requirements are not meant to increase HP or torque they are meant to reduce emissions. While they do cause a lot of problems with the engines they have very much improved the soot, smell, and heavy particulates you mention.
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