The pollutant that everone is talking about is called acrolein. Don't know how big of a problem it is, but it sounds kind of nasty, although it does not persist in the environment for very long. The website OMNSCUR_Net referenced had a discussion on this not too long ago. Most concerns about durability with WVO/SVO systems has to do with injectors coking up, spray pattern becoming strange and washing down the rings and /or ring stick. Again, most people that say this have decided biodiesel is the best alternative fuel. I'm with biodiesel just because if you make a good product, you won't have any problems except maybe some initial filter plugging as it cleans out the fuel system. This would also be expected on SVO(so get ready folks, take a few extra fuel filters). To answer the gentleman from Germanuy's question, there is a concern about biodiesel or veggie in older natural rubber equipped fuel systems, but at least on my truck, al rubber parts are easy to reach an d replace if teh begin to leak. It has not been a big problem for the biodiesel crowd over here, many of whom run older Mercedes 5 cylinder IDIs or old VW IDIs.
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J.D.'s Fords: 1986 F-250 6.9 diesel Solid State Glow Plug System 3.55 gears C-6 2WD 178,960 miles.... it still runs pretty good!
Wishlist H-max turbo, T19 tranny,
1989 Ford Ranger ga$$er, non runner, soon to be donated or scrapped!
today i talked again to my dieseltech at work. i was wrong in the lubrication case, sorry for that. but the destroing rubber thing, he says, is exact the opposite. natural rubber is the only rubber that withstands biodiesel. and i am talking of b100. btw there is NO german car builder left who states biodiesel proof in his car manuals. to much trouble with fuel lines that go soft like bubblegum and the inner diameter of the fuel lines decreases so much that almost no fuel can pass. he says don't use biodiesel, your fuelpump diapragm will go bad. to change the fuel lines isn't a problem, but to get a pump over here ...
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93' F250 , 96'PSD inside, 4X4, 5 Spd, Valeo SMF, 3in. DP, DIY Open Intake, Dual Mercedes-Fuelfilter, Dual Deutz-Oilfilter, Electric Fuel Heating, Pierburg Electric Fuel Pump(no bowl, only regulator left), Webasto Comfort Heating
96' F350 CC Long Bed, 2WD, E4OD, Totaled, Only Body Left
Okay, so now we need to hear from someone who knows whether or not EDPM - the most common material for pump diaphragms - is or is not affected by B100.
In plumbing systems, it is EDPM, and NOT butyl rubber, that you want to have in contact with the glycol - either ethylene or propylene glycol - that runs through heat systems. A different kettle of fish, for sure, but I can't find my website for the chemical compatibility of various "rubbers" and "plastics"...
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Sold: 1999 White Lariat CC SB F-250. Sold to next-door neighbor in 2001....received final payment 2007! Still going strong at 198Kmiles as of Dec'07
Sold: 2001 Bright Amber Lariat CC LB F-250 with 4 million candlepower of LightForce lights in the bow. Line-X bedliner. Dual alternator. Clearance lights. Glass-tite cap. 250-gallon auxiliary tank for trips to the Lesser 48. 70-gallon auxiliary for trips around Alaska. Rec'd Dec'07: '08 ForestGreen/Gold F-350 CC LB. Handshaker, as always, Rear stabilizer, rear static video, rear step, dual alternators. B&W turnover ball on its way; soon to be Line-X'd. LightForces on their way.
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Okay, so now we need to hear from someone who knows whether or not EDPM - the most common material for pump diaphragms - is or is not affected by B100.
In plumbing systems, it is EDPM, and NOT butyl rubber, that you want to have in contact with the glycol - either ethylene or propylene glycol - that runs through heat systems. A different kettle of fish, for sure, but I can't find my website for the chemical compatibility of various "rubbers" and "plastics"...
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A reference I checked has this to say:
Butyl Rubber, Ethylene Polypropylene Rubber, e.g. EPDM, EPT, EPR: Good resistance to ozone and weather. Especially suitable for aggressive chemicals. <font color="red"> Unsuitable for oils and fats. </font>
In another spot, it lists for diesel oil (they don't list biodiesel)
Buna-N: resistant to 104 F
EPDM, EPT: Not recommended
Neoprene: conditionaly resistant to 68 F
Viton: resistant to 104 F
I'm wondering about the lower temperature limits for Buna-N and Viton in this reference. I believe PSD injector o-rings are made of Viton (or maybe Buna-N), and they operate at well above 104 F.
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