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Old 11-21-2015, 10:28 AM   #1
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ALERT! Biodiesel

make sure that you research fuel in your travel area in advance. Fuel containing more than five percent biodiesel could void your warranty. I asked customer service for advice. M-B instructed me to use only National Branded Truck Stops. I asked, "like pilot/flying J"? The rep said,"yes". i had already spoke with Pilot/Flying J. They said, "our diesel contains a minimum of ten percent biodiesel" As per required by EPA all diesel contains at least five percent. some states fifteen percent.

From Mercedes lips to your ears...

http://www.mbusa.com/vcm/MB/DigitalA..._Brochure5.pdf

my advice...change oil every eight thousand. Un-burned fuel is returned to the crankcase, thus contaminating your lube oil. Bio has a higher flash point than fossil. Most of the bio will not ignite. Also keep close on oil level, it can increase crankcase capacity
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Old 11-21-2015, 12:56 PM   #2
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And don't roll in with 5 ounces left in the tank only to discover you can't use what they got! However....my dealer told me what MB requires is the industry standard at stations throughout the US ("Regular Ultra-Low Sulfur Diesel (ULSD) fuel meeting ASTM D975 can contain biodiesel up to 5%.") I sure hope that's right!


MB also says "B20 blends are generally not approved and should be only used on a very limited basis and only if unavoidable."

Never use B100 which is 100% biodiesel.
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Old 11-21-2015, 02:52 PM   #3
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My gas station in San Diego states nothing about biodiesel percentage
No issues with it. Just states ultra low sulfur


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Old 11-21-2015, 09:58 PM   #4
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That's the point. It's our responsibility to know what we are putting into our Sprinter fuel tank. The percentage of bio is not divulged at most pumps. See the problem
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Old 11-22-2015, 01:49 AM   #5
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You have to go inside and ask the manager.


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Old 11-22-2015, 06:04 AM   #6
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Just add an additive to bring it up, I always add Ford Gold with every fill up. Helps with your injectors.
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Old 11-22-2015, 11:24 AM   #7
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Quote:
Originally Posted by Phinias View Post
make sure that you research fuel in your travel area in advance. Fuel containing more than five percent biodiesel could void your warranty. I asked customer service for advice. M-B instructed me to use only National Branded Truck Stops. I asked, "like pilot/flying J"? The rep said,"yes". i had already spoke with Pilot/Flying J. They said, "our diesel contains a minimum of ten percent biodiesel" As per required by EPA all diesel contains at least five percent. some states fifteen percent.

From Mercedes lips to your ears...

http://www.mbusa.com/vcm/MB/DigitalA..._Brochure5.pdf

my advice...change oil every eight thousand. Un-burned fuel is returned to the crankcase, thus contaminating your lube oil. Bio has a higher flash point than fossil. Most of the bio will not ignite. Also keep close on oil level, it can increase crankcase capacity
This has been a known issue since 2010 on the diesel truck/car sites. We just deal with it and put on double fuel filters to keep the crude out of the pump and injectors. The crude comes from the your fuel tank after using regular fuel and than Bio-fuel. Bio-fuel happens to clean real real good and the crude is stuff that is left in your tank from regular diesel fuel.

On my wife's 2011VW Jetta TDI; we received a letter from VW stating that the warranty would be honored using B20 fuel in IL. Reason IL mandates a certain percent of the fuel refined/sold must be B20.


"No unburned fuel is not returned to your crankcase it is returned to the fuel tank."

The way unburnt fuel is returned to the crankcase is due to the regeneration cycle were fuel is used to burn off the diesel particulates that are captured in the Diesel Particulate filter. When the filter reaches a certain level of containment and the deferential pressure switch senses a restriction, the regeneration cycle is started. The way this is accomplished is to use diesel fuel that is injected into the exhaust cycle and the DPF temperature is raised between 1200 and 1450F. These temperatures will reduce the particulates to ash. During the exhaust cycle some fuel can enter the crankcase and cause your oil level to increase.

On my Ram I monitor the oil quality and in 92,000 miles I have always had less than 1% of fuel dilution to the oil in 7,000 miles. My truck will regenerate ever 300 miles or so when I towed our 5er. My EGT gage will raise to 1450F for 20 min's or so as the filter is cleaned.
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Old 11-22-2015, 12:12 PM   #8
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Maybe with RAM but not Sprinter.
It it were returned to the fuel tank there would be no problem. The unburned fuel is sent to the crankcase where theoretically it evaporates due to crankcase temperature. That is not a problem with fossil. However, Bio withstands the crankcase temp. and blends with the lube oil. I spent an hour on the phone with Mercedes North America. The engineer explained this problem to me. M-B in design had no premeditation that the Feds would force Bio-Blend. I was told when traveling to watch my oil level and to drain excess when necessary.
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Old 11-22-2015, 07:19 PM   #9
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I try to use "Auto" diesel whenever possible. Supposedly is limited to just 5% bio, but you never know....
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Old 11-22-2015, 07:24 PM   #10
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I just found a pdf that states that Cummins and John Deere allow up to B20...humm.....
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