Alright...biodiesel eats natural and butyl rubber. It will not harm viton, neoprene, and fuel injection rated hose from all reports. Whats on the inside of a Dodge injector pump? Its a bit different from a DB2. I have been running B100 most of teh time for about 3 years and well over 20K miles. I do have leaky fuel return lines....I've had to replace a lot of filters becuase I have made some bad fuel and gotten the tanks contaminated with red-brown algae. I run an inline fuel filter and an electric fuel pump so I wind up replacing these pretty often...much more than the stock filter. I think its the tanks more than the biodiesel because I have had this problem even on the rare occasions where I've run standard D2 since my tanks got gunked. Also...the new ULSD lubricates OK...its the fact that it has a lower amount of aromatic hydrocarbons than the older 500ppm D2 that causes failures. The rubber orings get used to a certain level of aromatics, swell to that point...and when lower aromatic fuel is used the orings shrink and allow leaks, at least that is my understanding. One fuel injkection shop guy told me my pump is leaking out the weephole, but I have so many return leaks and so much gunk in the valley pan I don't know how he can be sure. If it is junked it has taken a long time, I've burnt some pretty gunky batches of fuel...bio, D2 and mixtures, even some WVO, and I believe any failure is likely either do to poor pump construction at the rebuilder, fuel starvation from weak e-pumps before I got the Holley Red, or running the pump without an H2O sep.(I know better). I don't want to dissuade anyone from using it...its good stuff, cheap and clean. Its messy to make...but not hard, and not time consuming. If you are careful not dangerous either, and even safer ifyou have a sealed processor. I will know more about my fuel system after I get my injectors pop tested, time the truck with tools, and fix my leaks. Sorry for the long post.
