HoustonChronicle.com - Scientists' group says gasoline beats diesel for cleaner
airThis doesn't really jive with what I have read in other places. For
instance a diesel set to run
at its most efficient RPM as a constant speed engine to charge batteries is
much more efficient
and cleaner than a gas engine is. I also believe that the use of bio-diesel
would improve those
numbers as well. Usually when I see a piece like this, I see it as someone's
little personal axe
to grind just because they don't understand diesel and form opinions based on
what they see in
traffic. Lots of smoke from big trucks and big buses, which doesn't have to be
in this modern age.
Diesels can be cleaned up to run very efficiently and will generally outlast
gasoline engines, making
up for the premium price paid on the initial purchase.
*Wireline*
http://www.chron.com/cs/CDA/ssistory.mpl/business/2346425
HoustonChronicle.com
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Jan. 10, 2004, 12:44AM
Scientists' group says gasoline beats diesel for cleaner air
Reuters News Service
WASHINGTON -- Gasoline-powered vehicles and hybrid cars that run on
both gasoline and electricity will be more cost-effective than diesel engines
for the foreseeable future for cutting U.S. oil use and polluting emissions
linked to global warming, a new report said last week.
The study, from the Union of Concerned Scientists, comes as
automakers and their allies in Congress promote diesel engines, despite poor
sales in the U.S. market, as a way to address concerns about oil dependence and
global warming.
"Proponents should not oversell diesel technology as a silver
bullet," said David Friedman, research director for the group's Clean Vehicles
Program and a co-author of the new report. "While diesels may eventually shed
their image as an industry black sheep, they still can't match the pollution
performance of today's cleanest gasoline cars."
In its report, the group used detailed modeling to examine for the
first time how diesel and gasoline vehicles competed among a variety of cars
and trucks, applying improved engines and other conventional fuel-saving
technologies that could be implemented today, as well as advanced and hybrid
technologies that could be implemented within the next 10 to 15 years.
Improved diesel and gasoline vehicles could reduce oil use compared
to today's vehicles by as much as 40 percent using conventional technology, and
hybrid-electrics could cut oil use by as much as 50 percent, according to the
report.
However, the sticker price of diesel-run vehicles for similar
reductions would be higher than improved gasoline and hybrid gas-electric
vehicles.
For example, it would cost a consumer about $2,800 over the price
of today's vehicle for an improved diesel that could cut oil use by about 30
percent. That's 2.5 times more than it would cost to achieve the same
reductions with an improved gasoline vehicle, the report found.
The higher price of both improved diesel and gasoline vehicles are
more than offset by reductions in fuel costs, on balance saving consumers
between $400 and nearly $2,000 over a vehicle's useful life, the report said.
In all cases, the report finds that improved gasoline vehicles save
consumers more money because of their substantially lower initial price tag.
"New pollution controls may one day clean up diesel's dirty image,"
said Patricia Monahan, a senior analyst in the group's Clean Vehicles Program
and lead author of the new report. "But, head to head, our report shows that
improved gasoline vehicles are the better buy."
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