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You are seeing the old diesel not the new stuff. If you can remember when we changed from regular leaded gas to no lead gas back in the 80's and think of it in that matter it is a lot easier to follow. While I do not remember all the dates I will try to explain it to you. Years ago there was only high sulpher diesel. (less than 5000 ppm of sulpher) Now a days high sulpher can only be sold for off road use and must be dyed red. To cut emissions they came out with low sulpher diesel. (less than 500 ppm of sulpher) This is road diesel and can be sold green (road use) or off road (dyed red) This is the stuff they are selling out of the pump marked can not be used in 2007 vehicles. To cut emissions even more the law has changed that after June 1 2006 manufactures must start phasing in Ultra low sulpher diesel. (less than 50 ppm sulpher) Stations have a even longer time to phase it in but I think it needs to be 100% for all road diesel in 7 years. Since all 2007 diesel vehicles can ONLY use Ultra low diesel and stations can sell either Ultra low or regular low during the phase in period all pumps that have the old diesel; low sulpher; must be marked with a sign that says this diesel can not be used in 2007 or newer vehicles.
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