I’m having what appears to be injector nozzle deposit problems. Over the last few weeks have had rough idle (@900 rpm and below). After putting two bottles of RedLine in the tank it helped some, but it still idles rougher and noisier than it did 10K miles ago (got 76K miles). Anyway, local diesel shop suggested running 5-gallons of bio-diesel into an almost full tank to see if the solvent properties of bio would remove deposits and help free up any sticking injector needles. He says he’s done this before and it won’t be a problem. However, Dodge does not recommend anything above a B5 (5%) bio mix.
Dealer where I brought the truck says absolutely no… they’ve seen may problems (inj-pumps, etc) with trucks that have run even B5 mix. Anybody have any experience with running a 20% mix for one tank?