I've been running B100 in my 85 300TD Wagon for 2 years and 46,000 miles. I replaced the lines between the pump and the injectors because I noticed some seepage about 10,000 miles ago. These were the original 19 year old fuel lines mind you. The car performs flawlessly, no soot, pleasant smell. Bottom line....if your fuel lines are solid, just fill'er up and go. Everyone would be better off if you did!