Biodiesel fuel use Beware!
So here is what I found and it truely is eye opening.
source : thedieseldriver.com
The five manufacturers that offer passenger car diesels in the U.S., Audi, BMW, Mercedes-Benz, Porsche, and Volkswagen continue to maintain that B5 is their recommended blend. Given the move towards greater biodiesel content, all of the manufacturers are not only concerned but currently studying the long-term effects of the newer blends on their engines. A statement in a Mercedes-Benz Biodiesel Information publication makes the automaker’s position crystal clear: “Diesel fuels containing a higher percentage of biodiesel, (e.g. B6 to B20) according to ASTM D7467 as well as straight biodiesel (B100/100%) ASTM D6751 may cause severe damage to your engine/fuel system and are not approved.” In case there are any lingering doubts, one need only read the last page: “Any damages caused by the use of such non-approved fuels will not be covered by the Mercedes-Benz Limited Warranty.”
Illinois, incidentally, is not alone in its use of biodiesel fuel. Other states that require a biodiesel blend include Alabama (5%), Colorado (20%), Florida (not specified), Kansas (2%), Kentucky (2%), Maryland (5%), Massachusetts (15%), Minnesota (B20 to B100), Missouri (B20), Nebraska (not specified), New Mexico (5%), New York (not specified), Ohio (not specified), South Carolina (5%), Virginia (2%), and Washington (not specified).
This part is priceless:
“We recently purchased a BMW X5 diesel SUV. The manual states that that diesel fuel cannot be over five percent bio or the warranty would be voided. However, in Illinois, about the only diesel fuel available is 11-20% bio… Both the BMW and Mercedes dealers say its okay to use 11 to 20% bio. However, when we asked them if BMW or Mercedes would agree to honor the warranty they both said no… However, we can’t understand how BMW can sell diesel cars in Illinois without disclosing the fuel is not readily available in Illinois.”