All the diesels sold since the 2006 model year have an emissions system that is incompatible with biodiesel. The particulate filter has to be periodically purged by dumping fuel into the exhaust to bring it up to temperature and burn off accumulated crud. All manufacturers except one have accomplished this by triggering an extra injection pulse during the exhaust stroke. Unfortunately, biodiesel does not fully vaporize. Some will pass down the cylinder walls, past the piston rings and into the oil sump. There it polymerizes the oil, turns it into a solid, kills the engine, and voids the warranty. Caterpillar put an extra injector in the exhaust manifold and does not have this problem.
If you have a 2007 or later diesel, I'd consider skipping biodiesel altogether. -Dave Walton On Tue, Nov 10, 2009 at 9:07 PM, Redghost <redgh...@comcast.net> wrote: > It was a while ago, around 2004 that we ran B100 in the cars from a small > distributor. Not sure who made his stuff, but SWMBA forbid any B mix above > 50%. When that happened issues went away, and the new parts have not > failed. > > clay > > On Nov 9, 2009, at 5:31 PM, ernest breakfield wrote: > >> Clay, >> >> jeeze,... if BioD was getting to where it could eat valve seal covers and >> engine mounts, i'm not sure you can blame the BioD; it sounds like you were >> *starting* with catastrophes... ;-) >> >> but seriously, considering how long i've been able to run pretty much >> straight BioD without any issues in my '85, if you had lines getting chewed, >> i'd be questioning the processing methods of whoever was supplying your >> BioD. >> >> >> cheers! >> e >> >> >> Redghost wrote: >>> >>> I did have issue with B100 in that it ate the lines twice in both Gump >>> and the E300D, ate the valve seal cover, dissolved engine mounts, and >>> various other catastrophes. The '95 had original fuel line and replacements >>> were supposedly Viton, but turned out not to be. Once I got the real viton >>> lines, the issue of melting went away. >>> >>> clay >>> >>> On Nov 8, 2009, at 5:05 PM, ernest breakfield wrote: >>> >>>> B5 isn't strong enough to give you any of the downsides of BioD, but is >>>> enough to replace the lubricity in the fuel that was lost in the switch to >>>> ULSD. >>>> i seriously doubt that it's likely to be strong enough to do much of >>>> anything in the way of cleaning out any built-up gunk in the fuel lines. >>>> >>>> by the time your '92 was made, many companies were already switching to >>>> fuel hoses that are supposed to be BioDiesel-compatible; odds are yours may >>>> be BioD-compatible already, but if not i wouldn't worry about it anyway. >>>> in my own personal experience and after watching the thousands of cars >>>> in the Biofuel Oasis fleet here in Berkeley, i think the concerns of >>>> BioDiesel use are heavily overblown in the press (and online forums). when >>>> i >>>> switched to B100 in our '85 (at ~121K miles), i changed the fuel filters at >>>> each of the next couple of oil changes, though there was never any >>>> indication that there was any need to. >>>> likewise, i swore i'd keep an eye on the fuel lines (like i would >>>> anyway with any 20-year-old car) and change them when i saw any indication >>>> of any need to; it's been 6 years and 65,000 miles so far, and i'm still >>>> waiting to see any indication of any impending failure. >>>> >>>> bottom line? do it and forget about it; you'll probably never notice >>>> any difference except that it might idle a tiny bit smoother, and you'll >>>> have an extra 45¢/gallon in your pocket. >>>> >>>> >>>> cheers! >>>> e >>>> >>>> >>>> waltlas...@juno.com wrote: >>>>> >>>>> There is a local station here selling B-5 Diesel for 45 cents less a >>>>> gal. than pure Diesel. My question is: Can I use that safely in my 1992 >>>>> W140 300SD/S350 Diesel, with normal Diesel hoses, etc? >>>>> Walt Lasher >>>>> Seattle >>>>> 1992 S350 Diesel >>>> >>>> _______________________________________ >>>> http://www.okiebenz.com >>>> For new and used parts go to www.okiebenz.com >>>> To search list archives http://www.okiebenz.com/archive/ >>>> >>>> To Unsubscribe or change delivery options go to: >>>> http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com >>> >>> >>> _______________________________________ >>> http://www.okiebenz.com >>> For new and used parts go to www.okiebenz.com >>> To search list archives http://www.okiebenz.com/archive/ >>> >>> To Unsubscribe or change delivery options go to: >>> http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com >>> >>> >> _______________________________________ >> http://www.okiebenz.com >> For new and used parts go to www.okiebenz.com >> To search list archives http://www.okiebenz.com/archive/ >> >> To Unsubscribe or change delivery options go to: >> http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com > > > _______________________________________ > http://www.okiebenz.com > For new and used parts go to www.okiebenz.com > To search list archives http://www.okiebenz.com/archive/ > > To Unsubscribe or change delivery options go to: > http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com > _______________________________________ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
