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Old 08-09-2015, 03:15 PM   #43
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For what it's worth:
* just a bit less than 2 gallons for our first 5000 miles
* a bit less than 1/2 a gallon for most recent 900 miles

So: I'm averaging ~ 1 gallon per 2500 miles; or another way to l look at it: slightly less than 1% of fuel consumption. (which strikes me as very low?!)

In sync w/ this comment from a MB owners' forum

"Our 2010 ML uses about 4 - 5 gallons of DEF per 10,000 miles over our first 50,000 miles"
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Old 08-14-2015, 11:45 AM   #44
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More on biofuel after I stopped at 5 places on 2 interstates in Illinois near Chicago, and could only find diesel with bio blend between 5-20% I did NOT use it, and now am back in storage with a quarter of a tank and not sure where to fill up next.

So in reading the MB website about biofuels, here's what they say:

Mercedes-Benz USA approves the use of B5 according to ASTM specification D975 [Ultra-Low Sulphur Diesel (ULSD) with a maximum of up to 5% biodiesel] in all Common Rail Injection (CDI) and BlueTEC® diesel engines.
The only approved processed biodiesel for B5 blending is one that meets the ASTM D6751 specification, to prevent damage to the engine and fuel system from deposits and/or corrosion.
The use of diesel fuels containing a higher percentage of biodiesel, (B6 to B20) according to ASTM D7467 as well as straight biodiesel (B100) according to ASTM D6751 may cause severe damage to your engine and fuel system, and are not approved by Mercedes-Benz.
The Mercedes-Benz New Vehicle Limited Warranty generally does not cover damage caused by the use of fuels that do not meet Mercedes-Benz approved fuel standards.
If customers cannot avoid the use of biodiesel fuel between B6 and B20, it’s critical for them to monitor their engine oil level and engine running performance.
Customers of Mercedes-Benz vehicles must use only qualified commercial brand fuels that meet Mercedes-Benz approved fuel standards. Biodiesel fuel from non-name brand stations must not be used.
Important: Fuel that contains any percentage of “home brewed” biodiesel does not meet Mercedes-Benz fuel standards and must never be used in Mercedes-Benz vehicles.
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Old 08-15-2015, 11:33 AM   #45
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Hi - I have been filling up my Interstate when I get home so I'm ready to go for the next trip. Is that a bad idea? Will my fuel go bad just sitting there? If so, how long is it safe to let it sit? Thanks all.
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Old 08-15-2015, 12:38 PM   #46
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I too live in Illinois and know of one station in the western suburbs that had the correct fuel. After each trip I fill up with the good stuff but am "forced" to use the other on the road. I'm told that Shell diesel is the good stuff but when pulling up to the pump at the Shell station the diesel pump says "not a shell product" and has the 5 to 20 biodiesel. I too am looking for suggestions to find the correct fuel. Is there an app?
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Old 08-15-2015, 01:19 PM   #47
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Have you ever seen corn squeezens at a truck stop?
It is a question ruin your engine or let the corn farmers starve?
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Old 08-15-2015, 01:53 PM   #48
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Quote:
Originally Posted by HowieE View Post
It is a question ruin your engine or let the corn farmers starve?
Corn is not the only crop they can grow— other crops can grow in the same dirt that corn grows in— so I say if it's a choice between ruin my engine or let them starve, they're going to get awfully hungry. Sure as anything they're not going to pay for my ruined engine if I use their fuel, so why should I pay them to ruin my engine?

If anybody is interested, here is a link to a Mercedes Benz brochure regarding the issue of biodiesel fuel. But, no, it doesn't list sources for B5 or less, just explains why B20 is bad. Multiple reasons, some of which I didn't know.
https://www.mbusa.com/vcm/MB/Digital..._Brochure5.pdf
And a different, smaller brochure for Illinois residents…
http://biodiesel.org/docs/default-so...e.pdf?sfvrsn=2
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Old 08-15-2015, 03:57 PM   #49
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Quote:
Originally Posted by John Millner View Post
I too live in Illinois and know of one station in the western suburbs that had the correct fuel. After each trip I fill up with the good stuff but am "forced" to use the other on the road. I'm told that Shell diesel is the good stuff but when pulling up to the pump at the Shell station the diesel pump says "not a shell product" and has the 5 to 20 biodiesel. I too am looking for suggestions to find the correct fuel. Is there an app?
here's a link to the Google search: non-bio diesel fuel in Chicago

https://www.google.com/maps/d/viewer...E7vTSjOA&hl=en
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Old 08-15-2015, 04:27 PM   #50
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It is a question ruin your engine or let the corn farmers starve?
I didn't realize they used corn to make biodiesel. Figured it was probably soybeans or packing plant renderings.

The one and only reason that farmers are growing so much corn now instead of soybeans, wheat, oats, etc is ethanol. The US is the laughingstock of the world as we burn our food in are vehicles. Adding ethanol to gasoline is just wrong on so many levels most of which are gov't related. Makes about as much sense as burning coal to generate electricity to charge batteries for electric cars.
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Old 08-15-2015, 04:52 PM   #51
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I didn't realize they used corn to make biodiesel. Figured it was probably soybeans or packing plant renderings.
All of that partially-hydrogenated vegetable oil (mostly made from corn) that no one wants to put in their bodies anymore goes in our diesel tanks instead.
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Old 08-15-2015, 05:06 PM   #52
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Once had someone put 47 liters of gas in a diesel tank on a sailboat. We immediated isolated the tank (thankfully it had a master shutoff) and called a diesel mechanic. He said traces of gas were ok but larger amount could cause an explosion. Gas floats on diesel so we siphoned off the gas and diesel already in the tank (about 50 liters of diesel plus the 47 of gas). Filled the tank with diesel (150 liters). Siphoned almost all of that out. Filled it again and siphoned it again. Filled it, prayed, started up and everything ran fine. No idea if there are other approaches but that one worked for us. Fortunately we were at a large fuel dock for commercial vessels that had the equipment.
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Old 08-15-2015, 05:30 PM   #53
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All of that partially-hydrogenated vegetable oil (mostly made from corn) that no one wants to put in their bodies anymore goes in our diesel tanks instead.
Can they still get the oil after the ethanol process?
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Old 08-15-2015, 05:37 PM   #54
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Ya'll do realize that Brazil has been E100 for a couple decades. Are you laughing at them?
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Old 08-15-2015, 06:23 PM   #55
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No because they use an energy efficient (i.e. it takes less energy to make the ethanol than you get back unlike our corn-based ethanol) one stage process w/ sugar. Our gov't places a high tariff on imported sugar which is why everything here is made sweet using high fructose corn syrup. Which also partially explains the increase in obesity and diabetes in the US as the body doesn't process it very well.

Coca Cola bottled in Mexico uses cane sugar instead of high fructose corn syrup.
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Old 08-16-2015, 12:06 PM   #56
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it takes less energy to make the ethanol than you get back unlike our corn-based ethanol) one stage process w/sugar.
Not true. That would violate the second law of thermodynamics.

It does take less energy to make ethanol from sugar than to make it from corn, but still more than the usable energy you get from burning the ethanol.

Thought exercise— if it took less energy to make sugar-based ethanol than the energy you get back from ethanol, then all sugar-based ethanol-manufacturing plants would RUN on ethanol because they'd be able to produce more ethanol than they would use themselves.

Energy efficiency in the fuel manufacturing/refining industry comes from using a non-portable energy source (such as hydroelectric power, wind power, or large-scale solar) to make a portable energy source (such as ethanol). NOT from using less energy to make fuel than you get by burning fuel.
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