biodiesel causing fuel systems to rust?
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Junior User
Joined: Jan 2007
Posts: 55
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From: Tivoli, NY
biodiesel causing fuel systems to rust?
I'm curious if anyone has heard anything about the new biodiesel fuel causing parts in the fuel system to corrode.
A few weeks ago, I was reading complaints about the newer Dodge 6.7 ltr having a tremendous amount of issues and 3 people had to have the entire fuel systems replaced in 2007 and 2008 trucks at their expense of $ 18,000.00 Chrysler refused to cover even though still under warranty. At least 1 of the trucks had under 15K miles.
Now last night after speaking with a friend who owns a couple of ford diesles, incl. a 6.4, he mentioned the issue of biodiesel causing the fuel systems to rust because there is a high percentage of water in the fuel.
Again, wondering if anyone knows about this situation and if there is anything that can be done like an additive or something to avoid this major problem?
I sold my 2007 F350 PSD 5 months ago to save money and get through a tough winter, but wanted to buy another possibly 7.3 within a month or 2. I may buy my father's 2002 w/only 77K miles on it, but I'm concerned about this problem and if I should stick to a gasser until it is figured out.
Any input would be appreciated and thank you in advance!
A few weeks ago, I was reading complaints about the newer Dodge 6.7 ltr having a tremendous amount of issues and 3 people had to have the entire fuel systems replaced in 2007 and 2008 trucks at their expense of $ 18,000.00 Chrysler refused to cover even though still under warranty. At least 1 of the trucks had under 15K miles.
Now last night after speaking with a friend who owns a couple of ford diesles, incl. a 6.4, he mentioned the issue of biodiesel causing the fuel systems to rust because there is a high percentage of water in the fuel.
Again, wondering if anyone knows about this situation and if there is anything that can be done like an additive or something to avoid this major problem?
I sold my 2007 F350 PSD 5 months ago to save money and get through a tough winter, but wanted to buy another possibly 7.3 within a month or 2. I may buy my father's 2002 w/only 77K miles on it, but I'm concerned about this problem and if I should stick to a gasser until it is figured out.
Any input would be appreciated and thank you in advance!
Super Moderator
Joined: Jul 2004
Posts: 21,113
Likes: 3,939
From: Ohio
The supplier of fuel would be in question as to the failures, biodiesel will go bad faster than petroleum based fuels creating acids that will corrode the fuel system. Water is harder to separate from bio so adding an additional filter with a water drain will help. Check the recommendations from the manufacturer when using bio-fuel in a particular vehicle. Ford recommends only B5 for the 6.0L.
Junior User
Joined: Dec 2009
Posts: 93
Likes: 0
From: Chippewa Falls
BioDiesel from the pump should not have any water in it. If it does the supplier is selling off spec fuel. BioDiesel, If ASTM quality will not rust or corrode, It will clean and lubricate the system. Also starting in 2007 you should not use much Bio because of the emission crap on them. You will need to change your oil more often because of fuel leaking past the rings into your oil. A little bio in the oil is good but to much will cause foaming and higher oil pressure due to over filling. 2006 and under you can run B99.
Fleet Mechanic
Joined: Nov 2008
Posts: 1,573
Likes: 4
From: Seattle
So many myths floating around out there about biodiesel. My guess is that most of these myths originate from bad homebrewed batches. Unless there is some unknown problem at a commercial pump, the likelyhood of having water in biodiesel is no greater than having water in a petro diesel pump.
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