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Old 11-02-2012, 06:19 AM   #1
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I was told by the previous owner of the Bounder to stay away from Biodiesel. This weekend will be the first time that I fill up. When you’re at the pump how can you tell if it is just diesel or biodiesel?
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Old 11-02-2012, 06:27 AM   #2
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Here in Texas there is a sticker on the Diesel pump that will say something like "May contain up to 5% renewable diesel or biodiesel". As far as staying away from biodiesel is concerned, I'd go with your engine manufacturer's recommendations as far as what's allowable which should be in your engine operator's manual. Cummins, for instance, used to be at B5 (5% biodiesel) on some of their engines and up to B20 on others, IIRC.

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Old 11-02-2012, 07:03 AM   #3
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Here in Alabama I have noticed that there is no sticker on the pump if it is 5% or less; but if it is more than 5% it is mandatory that there is a sticker in your face on the pump. I have read a lot about this and found that most engine manufacturers say there should be no issue in using the 5% or less. When I see a sticker showing higher amounts I just pull out and move to the next place (I always use a 1/2 tank as the time to start looking for fuel). What biodiesel has been doing is clogging fuel filters because it releases all the gunk in the tank like algae. So my recommendation is to carry spare fuel filters with you just in case. Here in the Southeast it is next to impossible to find diesel that is not biodiesel.
Mel (Melanie) and Harry
2009 Tiffin Phaeton 40QTH
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Old 11-02-2012, 05:08 PM   #4
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i have been using 100% biodiesel/wvo for my cars for 10+ years, but that was/is for cars. when i looked for a class a couple months ago i was particular looking for older cummins equipped with mechanical injections for later burning biodiesel/wvo in mind. after talking to cummins advisers and judging pros and cons, i moved to isc engine so giving up the intention. from my car bio experience, 5% bio is nothing to worry about. gunk will come out if any but it'll not happen overnight. if it does block the passage, you can tell from engine performance, then you go change the filter. for most people you only drive couple thousand miles, the gunk will not block up the filter before you change the filter on annual intervals. for those very old coaches, say 20 years old, the rubber hoses or seals are not designed for biodiesel, which may somewhat become softened. overall, i don't think 5% or 10% will damage anything.
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