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Search: Keyword(s): ; Posts Made By: wxmanCCM
Forum: BMW Diesel Owners / Enthusiasts 06-26-2014, 11:45 AM
Replies: 47
Views: 1,367
Posted By wxmanCCM
True, but every admin since the Clinton admin has...

True, but every admin since the Clinton admin has adopted this EO, including the current one - http://epa.gov/environmentaljustice/resources/publications/interagency/ej-mou-2011-08.pdf.

Acid rain...
Forum: BMW Diesel Owners / Enthusiasts 06-25-2014, 01:39 PM
Replies: 47
Views: 1,367
Posted By wxmanCCM
In the RIAs I referenced previously, that was...

In the RIAs I referenced previously, that was EPA's justification for the mandated reductions in NOx from diesel engines; that most locations would see a net reduction in ambient O3 levels, even if a...
Forum: BMW Diesel Owners / Enthusiasts 06-25-2014, 12:17 PM
Replies: 47
Views: 1,367
Posted By wxmanCCM
This is just the latest in a series of studies on...

This is just the latest in a series of studies on this issue.

There have been at least 13 peer-reviewed studies (10 of which were independent) published in respected scientific journals in the...
Forum: BMW Diesel Owners / Enthusiasts 06-25-2014, 05:54 AM
Replies: 47
Views: 1,367
Posted By wxmanCCM
That's true, but gas cars (and even gas-electric...

That's true, but gas cars (and even gas-electric hybrids) still produce far more NMOG/VOC emissions per mile on average than diesels. Please see the full analysis I posted on TDIclub at...
Forum: BMW Diesel Owners / Enthusiasts 06-24-2014, 04:13 PM
Replies: 47
Views: 1,367
Posted By wxmanCCM
NOx emissions are regulated for two primary...

NOx emissions are regulated for two primary reasons - one is that NO2 (NOx is actually a "family" of oxides of nitrogen; NOx = NO + NO2 typically) has an ambient air quality standard (NAAQS); two is...
Forum: BMW Diesel Owners / Enthusiasts 06-17-2014, 09:24 AM
Replies: 44
Views: 2,607
Posted By wxmanCCM
An Environment Canada report was just published...

An Environment Canada report was just published in Environmental Science and Technology showing astonishingly high black carbon (BC, aka "soot") emissions in off-cycle conditions (cold start in cold...
Forum: BMW Diesel Owners / Enthusiasts 05-09-2014, 08:47 AM
Replies: 44
Views: 2,607
Posted By wxmanCCM
http://webpages.charter.net/lmarz/muncie/Prius.bmp...

http://webpages.charter.net/lmarz/muncie/Prius.bmp

Source: http://www.cleanairinfo.com/slcf/documents/Presentations/Lawson%20EPA%20SLCF%20March%204%202010.pdf (slide #2)
Forum: BMW Diesel Owners / Enthusiasts 04-30-2014, 10:54 AM
Replies: 44
Views: 2,607
Posted By wxmanCCM
According to the GREET model that I've referenced...

According to the GREET model that I've referenced previously, gasoline (E10) requires 34,460 BTU/gallon well-to-pump to produce; ULSD requires 29,961 BTU/gallon well-to-pump. Presumably ULSD would be...
Forum: BMW Diesel Owners / Enthusiasts 04-29-2014, 01:14 PM
Replies: 44
Views: 2,607
Posted By wxmanCCM
Steve, Here's what I get for the 2014 328d...

Steve,

Here's what I get for the 2014 328d and 2014 Prius (AT-PZEV) based on CARB certified emissions for "pump to wheels" (PTW) and EPA emission factors for "well to pump" (WTP)...

...
Forum: BMW Diesel Owners / Enthusiasts 04-28-2014, 01:01 PM
Replies: 44
Views: 2,607
Posted By wxmanCCM
Exactly!

Exactly!
Forum: BMW Diesel Owners / Enthusiasts 04-28-2014, 11:14 AM
Replies: 44
Views: 2,607
Posted By wxmanCCM
Here is the scale according to EPA... ...

Here is the scale according to EPA...

http://www.fueleconomy.gov/feg/findacarhelp.shtml#airPollutionScore


It's not really a formula as such, just a relative score based on vehicle emissions...
Forum: BMW Diesel Owners / Enthusiasts 04-28-2014, 10:17 AM
Replies: 44
Views: 2,607
Posted By wxmanCCM
That's actually a chart I produced via xcel. The...

That's actually a chart I produced via xcel. The link I provided in my previous post gives the methodology behind the graphic. The calculations and assessment are mine, and I request that any errors...
Forum: BMW Diesel Owners / Enthusiasts 04-28-2014, 07:58 AM
Replies: 44
Views: 2,607
Posted By wxmanCCM
Steve, Those two bullet points probably are...

Steve,

Those two bullet points probably are related, but the point I was trying to make in the second bullet point is that EPA uses a 55% city/45% highway duty cycle mix for calculating the...
Forum: BMW Diesel Owners / Enthusiasts 04-27-2014, 11:23 AM
Replies: 44
Views: 2,607
Posted By wxmanCCM
It has been my contention for some time that...

It has been my contention for some time that EPA/CARB developed Tier 2/LEV II emission regulations around what gasoline vehicles were technically able to meet, and diesels were left to fend as best...
Forum: BMW Diesel Owners / Enthusiasts 04-24-2014, 11:41 AM
Replies: 3
Views: 640
Posted By wxmanCCM
The 2015 X3 28d has been emissions certified by...

The 2015 X3 28d has been emissions certified by CARB - http://www.arb.ca.gov/msprog/onroad/cert/pcldtmdv/2015/bmw_ldt_a0080368_2d0_u2_diesel.pdf.

Based on the certified emissions, the X3 28d is...
Forum: BMW Diesel Owners / Enthusiasts 04-08-2014, 01:45 PM
Replies: 23
Views: 958
Posted By wxmanCCM
I certainly don't disagree. I'm just unconvinced...

I certainly don't disagree. I'm just unconvinced that EV technology is any "greener" than diesel technology, from a full life-cycle emissions perspective.

The NAS report mentioned in my previous...
Forum: BMW Diesel Owners / Enthusiasts 04-08-2014, 08:12 AM
Replies: 23
Views: 958
Posted By wxmanCCM
From an emissions perspective, there are many...

From an emissions perspective, there are many studies which cast doubt on the environmental benefits of electric vehicles in general. A 2009 study by the National Academy of Sciences (NAS) concluded...
Forum: BMW Diesel Owners / Enthusiasts 02-20-2014, 08:45 AM
Replies: 10
Views: 1,017
Posted By wxmanCCM
Agree. EPA itself acknowledged the...

Agree.

EPA itself acknowledged the under-representation of its official mileage for diesels in the "old" fuel mileage estimates (pre-2008) by about 4.3% (EPA, "Final Technical Support Document -...
Forum: BMW Diesel Owners / Enthusiasts 02-10-2014, 07:49 AM
Replies: 107
Views: 5,338
Posted By wxmanCCM
Completely agree. There was a survey...

Completely agree.

There was a survey conducted several years ago in which diesel vehicle owners focus on the performance and other aspects of diesel vehicles other than just fuel economy...

...
Forum: BMW Diesel Owners / Enthusiasts 02-07-2014, 01:00 PM
Replies: 17
Views: 1,440
Posted By wxmanCCM
In the NEDC (official European test driving...

In the NEDC (official European test driving cycle), the X3 xDrive20d (functional equivalent of the U.S.-spec X3 xDrive28d?) officially receives 5.4 l/100 km (urban)/4.8 l/100 km (extra-urban)/5.0...
Forum: BMW Diesel Owners / Enthusiasts 12-23-2013, 12:38 PM
Replies: 27
Views: 2,258
Posted By wxmanCCM
The 2014 Euro-spec 335d xDrive gets the same...

The 2014 Euro-spec 335d xDrive gets the same rating as the Euro-spec 530d xDrive (analog of the U.S.-spec 535d) in the official NEDC tests (6.4 l/100 km urban; 4.9 l/100 km extra urban). The...
Forum: BMW Diesel Owners / Enthusiasts 12-12-2013, 10:09 AM
Replies: 46
Views: 1,567
Posted By wxmanCCM
Not sure. I actually wrote an email to CARB...

Not sure.

I actually wrote an email to CARB inquiring about this apparent conflict in certification level. This is their response to my inquiry...

"...A manufacturer has the option to certify...
Forum: BMW Diesel Owners / Enthusiasts 12-12-2013, 08:35 AM
Replies: 46
Views: 1,567
Posted By wxmanCCM
Steve, It may be of interest to you to note...

Steve,

It may be of interest to you to note that the 328d technically meets the vehicle emission requirements of SULEV, even though it's "only" certified as ULEV...


2014 328d (Certified...
Forum: F30 / F31 / F32 / F33 (2012 - current) 12-12-2013, 07:49 AM
Replies: 169
Views: 9,228
Posted By wxmanCCM
Post #58 already has provided a very good...

Post #58 already has provided a very good response. Here are a few additions I can think of...

1) Complete combustion of hydrocarbon fuels results in CO2 and H2O as far as emissions are concerned....
Forum: BMW Diesel Owners / Enthusiasts 12-12-2013, 07:05 AM
Replies: 46
Views: 1,567
Posted By wxmanCCM
CO is actually an ozone ("photochemical smog")...

CO is actually an ozone ("photochemical smog") precursor. It has the same ozone production pathway as VOC/NMOG, just that it's much less potent of an ozone precursor than VOC.

The main reason CO...
Showing results 1 to 25 of 134

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