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Old 06-26-2015, 01:11 AM   #29
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Originally Posted by mjwcubed View Post
new to diesel and new to MB/AI - what is pure diesel? and how will I know? thanks!
Pure diesel will not have the 5% or 20% biodiesel labels on the pumps.
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Old 06-27-2015, 08:02 AM   #30
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NO bio-diesel in the fuel. The pumps are required to display a sticker on the pump or show a sign adjacent to the pump if the fuel is blended just like with what used to be known as gasoline.

If you find pure gasoline and fill the vehicle, you will see a noticeable increase in fuel economy and performance. The alcohol additive raises the per gallon price and reduces the btu capacity per gallon and thus we pay more for less mileage per gallon.

Many engines and their gaskets are intolerant of bio- diesel. Smaller vehicles lack the space for the huge fuel filters found on the big rigs. Thus smaller filters could plug after a few tanks of 20% bio-diesel.

Folks that drive small diesels, especially foreign brands with a smaller dealer network, should carry a couple of spare fuel filters and know how to change it if it plugs in a remote location.

My 2012 Cummins explicitly states in it's owner manual a maximum of 5% bio- diesel. Mercedes service explicitly told me to never put bio-diesel in either the 2007 or 2009 V6 Diesel engines. They also stated bio-diesel could plug the catalytic like part of the exhaust.
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Old 06-27-2015, 09:10 AM   #31
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I have seen a 10-20% label at a FJ. The Shell and BP stations i frequent don't have that but they are combination pumps with gas on one side and diesel oon the other. They have an ethanol sticker for the gas but nothing on the diesel side. I hope that means they are pure diesel.

Al
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Old 06-27-2015, 09:31 AM   #32
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Originally Posted by Protagonist View Post
Nothing has a positive energy balance. That would be a violation of a basic law of thermodynamics, the law of entropy. You will never get as much energy out as the energy that went into making it.
I mean more energy out than went into extraction/production of the fuel.
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Old 03-20-2017, 04:39 PM   #33
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Hi,
We're in Rantoul, Il, heading to Chicago for a few days. After stopping at multiple stations all sporting the same "between 5 and 20% biofuel" stickers on the pump I gave up and did a partial fill. (I saw some mention on the web that the norm here is 11%, but who knows?) I found a map showing lots of B5 or lower stations around Chicago, but I'm not sure we have the range. Spending a day stopping at every station with diesel and looking for stickers doesn't sound fun. How do you folks handle this? And extra points for a station twiixt here and Joliet that meets Mercedes perhaps unreasonable standard (he says surrounded by corn)....

thanks/r
I see your post from close to 2 years ago. You mentioned that you had a map showing stations that sell B5 diesel, is this something you can find online? My wife and I are picking up a 2016 Grand Tour in about 5 weeks. Thanks
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Old 03-20-2017, 10:21 PM   #34
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I think this is the map: http://biodiesel.org/using-biodiesel...ons/retail-map

From quick use of it, it only shows the biodiesel sites and what they sell. It doesn't show non-bio-diesel sites.
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Old 03-21-2017, 08:05 AM   #35
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Thanks
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Old 03-21-2017, 08:12 AM   #36
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The big 3 truck stops sell only bio-diesel - Flying J, Pilot and Love's. Up to 20% is not an option for my 2012 Cummins in our 2500HD. I swapped the stock under body 34 gallon fuel tank for an underbody Titan 56 gallon fuel tank.

I look for a Shell or a Chevron choice, but one must read the label on the pump because sometimes they have bio-diesel as well.
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Old 03-21-2017, 08:18 AM   #37
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I now carry a set of fuel filters/with tools at all times in my truck following a contaminated fuel incident last August which left my F-250, me and our blind lab on the side of I-10. We were lucky in that we were not towing. We had been to LSU in Baton Rouge for an eye check up for our lab. I got a prompt to "replace fuel filter soon" about the time we got to BR. Before we got back to Lake Charles the HP fuel pump bit the dust and wiped out the fuel system. I was fortunate my insurance picked up the $7k+ repairs. If I ever get the prompt again while traveling I will immediately stop and replace fuel filters. Additional fuel filteration is next on the agenda for the F-250.
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Old 03-21-2017, 05:27 PM   #38
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The one I referred to is: https://www.google.com/maps/d/I enviewer?mid=1d9cfKbe5JQJPtr-h_4BL41fUjx0&hl=en_US&ll=41.96328519134474%2C-88.86189000000002&z=7, focused on the Chicago area. Don't know if it's still accurate. I don't know of a source with nationwide coverage. I encourage any GasBuddy users to request they add a field to capture the diesel type. Not really hopeful, but it can't hurt to ask.
regards/r
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Old 03-21-2017, 07:30 PM   #39
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I'm a first time diesel owner with a 2015 Ram 2500 CTD. It was hard to find in the owners manual but my model year is supposed to take B20. All the diesel where I live is straight diesel. On my trips out West I just buy where its available. If the pump says between 5% and 20% I'll use it. I'm not going to drive around a strange town looking for the lone mom and pop convenience store that might have straight diesel. Maybe if Gas Buddy was able to filter to that level I would. If considering a purchase of a diesel vehicle don't purchase unless compatible with B20. Governments that push this BS biodiesel don't care if your vehicle is not compatible.

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Old 03-21-2017, 08:20 PM   #40
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A Google search shows that your question is common and lacks a good answer. None of the apps have the indicator you're looking for. I did send a request to Gas Buddy and got the generic "we're working on" something to show ethanol content - so I'm guessing B20, B5 or less is not on their radar screen.

The manual for my 2013 Chevy diesel indicates I can use up to B20 which is fine for now - unless B50 becomes the new standard....

Argh!

There is a lot of speculation that the warning against bio fuel is bogus but I wouldn't trust interwebs advice on a $60K truck...

Good luck!
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Old 03-22-2017, 09:13 AM   #41
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The big negative for bio-diesel and corn gas is that the price per unit of sale is typically higher for less BTUs of energy. One needs to carry a couple of sets of diesel fuel filters because there is particulate matter in the bio-diesel and even more so in the 20% stuff.

Mercedes service has told me to never completely fill up my 2007 Mercedes ML320 CDI V6 turbo diesel with even 5% bio-diesel and to fill up with straight diesel ASAP to keep the percentage low headed for zero.

On my 2012 Ram 2500HD Cummins, I installed a Cummins branded water separator at the side of the new fuel tank. The fuel then goes to the stock engine mounted filter / water separator and then to a Cummins branded two micron cartridge fuel filter before going into the fuel rail.

Even with their massive fuel filters, the big rigs are often disabled by the bio-diesel fuel and a seven to ten thousand dollar repair bill can be generated over three or four days. I know a shop in Gallup, NM beside I-40 that makes over a Million dollars a year just fixing fuel systems on the big rigs.

A little effort to avoid big-diesel and easier on the wallet than a repair
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Old 03-22-2017, 05:54 PM   #42
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Thanks, this our first Airstream and was not aware of all the different grades of diesel. Having 2nd thoughts of getting the unit and do traveling with it if I have to search all over the place for the correct diesel.
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