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Search: Keyword(s): ; Posts Made By: wxmanCCM
Forum: BMW Diesel Owners / Enthusiasts 04-23-2015, 07:27 AM
Replies: 69
Views: 1,612
Posted By wxmanCCM
ULSD has about 11% more energy per unit volume...

ULSD has about 11% more energy per unit volume than E0 regular gasoline - 129,488 BTU/gallon ULSD; 116,090 BTU/gallon E0 gasoline (LHV).

The difference is about 15% for E10 (112,194 BTU/gallon...
Forum: BMW Diesel Owners / Enthusiasts 04-21-2015, 08:04 AM
Replies: 13
Views: 549
Posted By wxmanCCM
That sounds like a very logical possibility also....

That sounds like a very logical possibility also.

The reason I suspected possible dosing issues is that a few of the tested cars in the ICCT study were able to meet the regulatory NOx emission...
Forum: BMW Diesel Owners / Enthusiasts 04-21-2015, 07:20 AM
Replies: 13
Views: 549
Posted By wxmanCCM
SCR has the potential to virtually eliminate NOx,...

SCR has the potential to virtually eliminate NOx, as long as the urea dosing is adequate. Cycle-averaged SCR NOx conversion efficiency is currently about 96%, and is projected to reach 98% in the...
Forum: BMW Diesel Owners / Enthusiasts 04-14-2015, 01:16 PM
Replies: 13
Views: 549
Posted By wxmanCCM
These studies were conducted on Euro 6 vehicles...

These studies were conducted on Euro 6 vehicles in Europe and Tier 2 Bin 5 vehicles in the U.S.

The full report for the U.S.-spec vehicles is available at...
Forum: BMW Diesel Owners / Enthusiasts 04-14-2015, 12:13 PM
Replies: 13
Views: 549
Posted By wxmanCCM
Another ICCT report focusing on real-world...

Another ICCT report focusing on real-world emissions of U.S.-spec diesel cars showed that the BMW X5 35d had NOx emissions that were at or below the regulatory limits in most of the real-world test...
Forum: BMW Diesel Owners / Enthusiasts 03-31-2015, 07:31 AM
Replies: 143
Views: 8,583
Posted By wxmanCCM
Gasoline prices will also be influenced by the...

Gasoline prices will also be influenced by the upcoming Tier 3 emissions regulation which will mandate that gasoline become "ultra-low sulfur" like diesel (ULSD). No one seems to know for sure how...
Forum: BMW Diesel Owners / Enthusiasts 03-01-2015, 11:47 AM
Replies: 25
Views: 1,256
Posted By wxmanCCM
At 5 years and a little over 80,000 miles. ...

At 5 years and a little over 80,000 miles.

Have had no problems other than recalls so far. Mileage has stayed quite steady at 34 mpg over a 30% city/70% highway drive cycle.
Forum: BMW Diesel Owners / Enthusiasts 12-22-2014, 08:41 AM
Replies: 22
Views: 1,157
Posted By wxmanCCM
Steve, This is where I got the E0...

Steve,

This is where I got the E0 assumption...

(Page 4 of 6 in the full PNAS paper)

It appears that the bullet point you quoted was for the ethanol pathways, and that they used E10 for the...
Forum: BMW Diesel Owners / Enthusiasts 12-21-2014, 09:01 AM
Replies: 22
Views: 1,157
Posted By wxmanCCM
I agree. Also, the UM study (OP) assumes E0...

I agree.

Also, the UM study (OP) assumes E0 gasoline; most gasoline now is E10, so the "gasoline" and "gasoline hybrid" would have to be shifted to the right 1/10th of the increased damages of...
Forum: BMW Diesel Owners / Enthusiasts 12-21-2014, 08:41 AM
Replies: 22
Views: 1,157
Posted By wxmanCCM
Steve, The y-axis represents the "damages"...

Steve,

The y-axis represents the "damages" to human health and the environment in terms of cents per vehicle mile traveled.



For the petroleum-based fuels...

Feedstock: Extraction of oil...
Forum: BMW Diesel Owners / Enthusiasts 12-20-2014, 09:38 AM
Replies: 22
Views: 1,157
Posted By wxmanCCM
This study more or less mirrors a 2010 study by...

This study more or less mirrors a 2010 study by the National Academy of Sciences ("Hidden Cost of Energy: Unpriced Consequences of Energy Production and Use.") In that study, diesel was projected by...
Forum: BMW Diesel Owners / Enthusiasts 12-14-2014, 11:06 AM
Replies: 19
Views: 983
Posted By wxmanCCM
Steve - You're probably correct, and pre-Euro 5...

Steve - You're probably correct, and pre-Euro 5 diesels may be a significant source of some emissions in Europe. Nevertheless, there has been no mention of the two-stroke scooters, which apparently...
Forum: BMW Diesel Owners / Enthusiasts 12-04-2014, 08:48 AM
Replies: 37
Views: 1,911
Posted By wxmanCCM
According to this site...

According to this site (http://www.nacsonline.com/News/Press_Releases/2014/Pages/PR103014.aspx#.VIB4fzHF9rq), ULSD averaged 11.6% higher nationally than RUG between January 2013 and August 2014.
...
Forum: BMW Diesel Owners / Enthusiasts 12-02-2014, 07:19 AM
Replies: 19
Views: 983
Posted By wxmanCCM
That's what is so ironic about this action - now...

That's what is so ironic about this action - now that diesels are as clean or cleaner than gasoline vehicles under Euro 6 which went into effect in September 2014, France and other European countries...
Forum: BMW Diesel Owners / Enthusiasts 12-01-2014, 11:17 AM
Replies: 19
Views: 983
Posted By wxmanCCM
This same article/topic is being discussed on...

This same article/topic is being discussed on tdiclub.com.

I'll ask the same rhetorical question I asked there - why are diesel cars being picked on when there are a myriad of other pollution...
Forum: BMW Diesel Owners / Enthusiasts 11-29-2014, 09:12 AM
Replies: 176
Views: 8,220
Posted By wxmanCCM
That's true, but there was a provision for...

That's true, but there was a provision for reimbursing owners of light-duty diesel vehicles of the extra federal excise tax on diesel fuel through a one-time tax credit. That provision expired...
Forum: BMW Diesel Owners / Enthusiasts 10-28-2014, 10:30 AM
Replies: 143
Views: 8,583
Posted By wxmanCCM
Yes, the PM emission standard is being reduced to...

Yes, the PM emission standard is being reduced to 3 mg/mile (0.003 g/mile) under Tier 3, down from 10 mg/mile (0.01 g/mile) under Tier 2. Vehicles will also have to meet a US06 supplemental FTP PM...
Forum: BMW Diesel Owners / Enthusiasts 10-28-2014, 07:09 AM
Replies: 143
Views: 8,583
Posted By wxmanCCM
One thing to keep in mind is that gasoline will...

One thing to keep in mind is that gasoline will be required to be "ultra-low sulfur" starting in 2017 as a result of the recently-promulgated Tier 3 LDV emission rule (supersedes Tier 2). Diesel fuel...
Forum: BMW Diesel Owners / Enthusiasts 08-22-2014, 07:56 AM
Replies: 47
Views: 2,380
Posted By wxmanCCM
July and YTD diesel sales are available at...

July and YTD diesel sales are available at http://www.hybridcars.com/july-2014-dashboard/ along with CNG, HEV, PHEV and EV sales.

The 328d and 535d actually sold better than either the X3d or X5d...
Forum: BMW Diesel Owners / Enthusiasts 06-26-2014, 11:45 AM
Replies: 47
Views: 1,801
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: 1,801
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: 1,801
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: 1,801
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: 1,801
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: 3,015
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...
Showing results 1 to 25 of 153

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