Diesel Engines That Run Well On B100 (100%) Biodiesel

My opinion on which diesel engines run well on B100 Biodiesel

1988-2003.5 Ford 7.3 Liter Diesel
- Excellent candidate for B100
- Pre 1999 may need fuel lines eventually replaced
- Usually the return line on drivers side head tends to eventually erode

2003.5 - 2007.5 Ford 6.0 Liter Diesel
- Poor candidate for B100
- Not Recommended. Expensive to fix if things go wrong
- If things go wrong, the cab usually has to be pulled - E-X-P-E-N-$-I-V-E
- They don't do well on Biodiesel, usually injector related
- Install secondary lift-pumps
- Filter fuel down past 5 microns
- Ensure it's well reacted, well washed, and extremely dry

2007.5-2008 Ford 6.4 Liter Diesel
- Not a good candidate
- Not recommended
- Diesel particulate filters don't do well with Biodiesel
- If removed, possibly will work; not a lot of people doing it

2009-2012 Ford 6.7 Liter Diesel Engine
- Warranted for up to B20 only
- Ford designed this engine from scratch, so far it's a much better engine
- You can use up to B20 and still be within warranty
- Still uses in engine post combustion injection to clean the DPF
- If DPF is removed, B100 should be able to be used, not many people have done this (that we have heard of)
- If not removed, oil dilution from Biodiesel will occur

GM 6.2 & 6.5 Liter Diesel Engines
- Fairly good candidate for Biodiesel
- Ensure the fuel is well reacted and well filtered
- Some issues with the electric eye in the injection pumps
(Some have said it's Biodiesel related, others have indicated that it's just a bad electric eye)
- Filter down to 10 microns
- Burns well on B100

2001 - 2007.5 GM 6.6 Liter Duramax Diesel
- Excellent Candidate for B100 Biodiesel!
- Very few issues related to Biodiesel
- Early years had leaking injectors, but not Biodiesel related
- Ensure fuel is well reacted and well filtered (5 micron or less)

2007.5-2009 6.6 Liter Duramax
- Warranty approved for up to B20 (20%) Biodiesel
- Not recommended for B100 (100%) Biodiesel if DPF left installed
- If DPF removed, runs excellent on B100 Biodiesel
- If not removed, oil dilution from Biodiesel will occur

2010-2012 GM 6.6 Liter Duramax
- Warranted for B20 Biodiesel
- Capable of handling B100
- DPF cleaning injector now located outside the engine

1989 - 1997 Dodge Cummins 5.9 Liter Diesel
- Excellent Candidate For B100 Biodiesel
- They love it! No problems
- Just be sure it's well filtered

1998-2002 Dodge Cummins 5.9 w/ VP-44 Injection Pump
- Excellent Candidate IF secondary lift pump installed
- This generation of the 5.9 had weak lift-pumps

2003-2006 Dodge Cummins 5.9 Diesels
- Fairly good candidate for B100 Biodiesel
- Filter the fuel down to 5 microns though
- Some have reported injector issues, but it's unknown whether it was Biodiesel or not

2007-2012 Dodge Cummins 6.7 Liter Diesel
- Only warranted for B5 personal or B20 in fleets
- Not a good candidate for B100 if DPF is installed
- If DPF is removed, the engine runs great on Biodiesel
- Not a lot of data on the trucks yet though with B100 Biodiesel

Learn more about the DPF issue here:

Utah Biodiesel Supply
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