Thanks David, 
For checking that source. We need more peer review. 

One problem with the internet is the old info is kept forever. 
This also applies to opinions based on old data. Another problem happens when 
different websites link to a bad opinion and the opinion from a single 
individual gets multiplied as if it's a common viewpoint. 

Thanks, 
Chuck 
Resolute 
1990 C&C 34R 
Broad Creek, Magothy River, Md 

----- Original Message -----

From: "David Knecht via CnC-List" <cnc-list@cnc-list.com> 
To: "Robert Abbott" <robertabb...@eastlink.ca>, "CnC CnC discussion list" 
<cnc-list@cnc-list.com> 
Sent: Wednesday, December 10, 2014 9:58:13 PM 
Subject: Re: Stus-List Diesel Fuel 

I did not read the entire pdf, but I think it is out of date. That document is 
from 1999, and subsequently, the government redefined the quality of diesel 
fuel. So from reading the sites below, it looks to me like the marine (small 
engine) fuel and road fuel are the same (at least have the same sulfur 
content). Dave 
https://www.dieselnet.com/standards/us/fuel.php 
http://www.epa.gov/OTAQ/fuels/dieselfuels/index.htm 



The cleaner diesel fuel program significantly reduces sulfur content, creating 
immediate health benefits, and allowing engine manufacturers to begin using 
advanced emissions control systems that further reduce harmful emissions. The 
diesel program regulations are located in 40 CFR Part 80 subpart I. 

    * A 15 parts per million (ppm) sulfur specification, known as Ultra Low 
Sulfur Diesel (ULSD), was phased in for highway diesel fuel from 2006-2010. 
Diesel engines equipped with advanced emission control devices (generally, 2007 
and later model year engines and vehicles) must use highway ULSD fuel. Exhaust 
emissions from these engines will decrease by more than 90%. 
        * Regulatory Program : Highway Diesel Fuel 
        * Fact Sheet: Heavy-Duty Engine and Vehicle Standards and Highway 
Diesel Fuel Sulfur Control Requirements (PDF) (4 pp, 124K, EPA420-F-00-057, 
December 2000) 
    * Low sulfur (500 ppm) and Ultra Low Sulfur Diesel (ULSD) fuel will be 
phased in for nonroad, locomotive, and marine (NRLM) engines from 2007-2014. 
These fuel requirements, coupled with advanced emission control technologies, 
will decrease emissions from these engines by more than 90%. 
        * Regulatory Program : Nonroad, Locomotive, and Marine Diesel Fuel 
        * Fact Sheets: Regulatory Announcement: Clean Air Nonroad Diesel Rule 
(PDF) (5 pp, 122K, EPA420-F-04-032, May 2004) 
    * EPA adopted changes to the diesel fuel program to allow for the 
production and sale of diesel fuel with up to 1,000 ppm sulfur for use in 
Category 3 marine vessels. The regulations generally forbid production and sale 
of fuels with more than 1,000 ppm sulfur for use in most U.S. waters, unless 
operators achieve equivalent emission reductions in other ways. 
        * Regulatory Program: Category 3 Marine Rule (PDF) (1 pp, 125K, 
EPA420-F-09-075, December 2009) 
        * Fact Sheet: Regulatory Announcement: EPA Finalizes More stringent 
Standards for Control of Emissions from New marine Compression-Ignition Engines 
at or Above 30 Liters per Cylinder (PDF) (6 pp, 144K, EPA420-F-09-068, December 
2009) 

Sulfur Content 


Since the 1990’s, fuel quality has been increasingly more regulated by the US 
EPA under the authority of the Clean Air Act. In the context of the 
increasingly more stringent diesel emission standards, the most important fuel 
property regulated by the EPA became the sulfur content. Historically, the 
sulfur content in diesel fuels for highway and nonroad vehicles was limited to 
0.5% (wt.) by ASTM specifications. The milestones in US environmental 
regulations limiting sulfur levels in diesel fuels can be summarized as 
follows: 

    * Highway Diesel Fuel 
        * 500 ppm: Sulfur limit of 500 ppm = 0.05% (wt.) became effective in 
October 1993. This fuel, commonly referred to as low sulfur diesel fuel, was 
introduced to facilitate sulfate particulate emission reductions, which were 
necessary for meeting the 1994 emission standards for heavy-duty highway 
engines. 
        * 15 ppm: Diesel fuel of maximum sulfur level of 15 ppm was available 
for highway use beginning in June 2006. This fuel, referred to as ultra low 
sulfur diesel (ULSD), was legislated by the EPA to enable catalyst-based 
emission control devices, such as diesel particulate filters and NO x adsorbers 
necessary for meeting the 2007-2010 emission standards for heavy-duty engines 
and the Tier 2 light-duty standards. 
    * Nonroad Diesel Fuel The following sulfur requirements are applicable to 
Nonroad, Locomotive and Marine (NRLM) fuels, with the exception of heavy fuel 
oils (HFO) used in Category 2 and Category 3 marine diesel engines. 
        * 500 ppm: Sulfur limit of 500 ppm became effective in June 2007 for 
nonroad, locomotive and marine fuels. 
        * 15 ppm: Sulfur limit of 15 ppm (ULSD) becomes effective in June 2010 
for nonroad fuel, and in June 2012 for locomotive and marine fuels. ULSD has 
been legislated for nonroad engines to enable advanced emission control systems 
for meeting the Tier 4 nonroad emission standards. 

s 
On Dec 10, 2014, at 9:13 PM, Robert Abbott via CnC-List < cnc-list@cnc-list.com 
> wrote: 



I know this topic was discussed to great lengths, but to anyone who is 
interested, here is the article I read that led to my question of marine diesel 
fuel versus regular diesel fuel. Not being a chemist or material scientist, and 
to any of those in these professions that might read this, to me, it seems to 
be a matter of sulfur content. 


http://www.epa.gov/otaq/regs/nonroad/marine/ci/fr/dfuelrpt.pdf 

Rob Abbott 
AZURA 
C&C 32 -84 
Halifax, N.S. 





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Aries 
1990 C&C 34+ 
New London, CT 



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