I pulled up to a Murphy gas station with a diesel pump. ON the pump it had a disclaimer that said the fuel contained Biodiesel and that I should consult my engine manufacturer before using, etc. The price was .10 cents cheaper than the diesel at race trac down the road, but I didn't bother filling her up at the murphy station without asking you guys here. I looked all over the pump for a sticker that would say how much biodiesel was blended, but there was none. I did see a dump truck fill up there a little while later, so people are using it. Given that this car has so many miles, and its 10 years old, I didn't want to risk it. My only understanding of biodiesel is that it requires multiple filters, but that's only if you are using 100% biodiesel. I don't know if you need to adjust anything else, etc., so please enlighten me! Is blended biodiesel (whatever the concentration) safe for this car? 2004 VW Passat 2.0 TDI with nearly 200k miles.