on diesel gas pumps lately, a sticker says 'don't use in 2007 trucks, cars, it may damage your moter. why

Answer 1

New Ultra Low Emissions rules for new cars and trucks for 2007.

S15 ULSD is defined by the EPA as diesel fuel with a sulfur content not to exceed 15 parts per million (PPM), a sharp contrast to current fuels with a sulfur content of 500 PPM. With the introduction of this new fuel on October 15, 2006, the agency aims to significantly reduce the amount of Oxides of Nitrogen (NOx) and particulate matter emissions.

To achieve these emission reductions, the EPA has established a comprehensive program to regulate diesel fuel along with the production of diesel engines. All on-highway heavy-duty diesel vehicles manufactured in calendar year 2007 and later will run on S15 ULSD fuel only. These truck engines will feature high-efficiency catalytic exhaust emission control devices or comparable technology to control particulate matter (PM) or soot from diesel exhaust. The engines will also require the use of a new motor oil, one completely reformulated to help protect engine components.

Pre-’07 engines manufactured and sold in 2006, will also be able to run on ULSD fuel without having to use the new engine oil. The transition to ULSD for these particular models could be lengthy because several cycles of fuel deliveries will be required to purge residual sulfur remaining in both vehicle and bulk storage systems.

Retailers are permitted to sell 20% of their stock at 500 PPM diesel fuel until 2010.

The most-discussed features of the new 2007 engines are known as Diesel Particulate Filter Systems (DPFs). These DPFs are estimated to weigh 110 pounds and contain a Cordierite (ceramic) honeycomb filter substrate that can be best described as fragile. The DBF will: 1) provide a variable volume of filtration and insulation; 2) supply catalytic combustion of hydrocarbons. Basically, exhaust gas flows into the open channels of the DPF and through its filter wall to exit at the other end, and soot is trapped within the channels. As several potential problems related to the device are still being discussed, it remains to be seen if this is the most efficient filtering device available to manufacturers.

One large uncertainty concerning 2007 engines and aftertreatment systems is how various engine components–fan belts, hoses, etc, will be affected by the engine heat that accompanies the use of filters. Heat loads are expected to be from 10% to 30% higher than today’s models, and testing is underway to determine what impact this will have on longevity and performance of components.


Here are the details

http://www.chevron.com/products/prodserv/fuels/diesel/ulsd.shtml

Here is the new EPA rule

http://www.opisnet.com/market/samples/epa_regs.pdf

http://www.concretepumpers.com/cgi-bin/htmlos.cgi/001664.1.2556184334612209626

Answer 2

it has nothing to do with BIO-FUEL it is that the sulfur has been reduced to 5 parts per million where as now the fuel contain es around 800ppm. the old fuel will clog the particulate filter in the exhaust system. and cause pr obs. with the emission system

Answer 3

I assume you are seeing that on pumps of BioDiesel. There is definately a problem with BioDiesel and certain engines.