MB fuel additive is Keropur from BASF - Mercedes-Benz Forum

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post #1 of 24 (permalink) Old 06-27-2007, 11:13 AM Thread Starter
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Post MB fuel additive is Keropur from BASF

OK, the dealer had to special order this for me; it cost $7.00 + tax for a 100ml (3.4oz) can that is designed to treat approximately 65 liters of fuel. If my math is correct, that is slightly more than 17 US gallons.

Briefly, the label says Keropur 3131 S45 N inside. Note: Preferably to be added to tank before refuelling.

MB product number is: A 000 989 25 45 12.

Here is a link to the Keropur section of the BASF website:

BASF Group: Keropur

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post #2 of 24 (permalink) Old 06-27-2007, 05:00 PM Thread Starter
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Question Comments?

I did not ask any questions earlier, and this thread was intended more as an FYI than anything, but I thought some of you might have opinions, one way or the other. I have not used this yet, but I fully intend to soon.

I am waiting until the fuel gauge warning light illuminates, which from past experience means I have a little over 2 gallons remaining. Then I will pour this little can into the tank (btw, they each come with a screw-on plastic spout), and then add 15 gallons of fuel to approximate the ratio on the label. Thanks in advance!

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post #3 of 24 (permalink) Old 06-27-2007, 05:19 PM
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I never let my uel get that low. I always fill up when I have a quarter tank remaining. Don't you have more chance of getting some sort of gook stuck into your injectors if you let your fuel run so low?
post #4 of 24 (permalink) Old 06-27-2007, 05:22 PM Thread Starter
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I don't think so if you always use "Top Tier" gas, but I suppose anything is possible. Like you, I usually don't let my fuel get anywhere near that low, but I am going to do that just so I achieve the proper concentration of additive to fuel. Another thing is this: most fuel pumps pull from the bottom of the tank, and that is where the gook probably resides. Someone please correct me if I am wrong regarding the W210 system.

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post #5 of 24 (permalink) Old 06-29-2007, 10:39 AM Thread Starter
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I guess nobody cares what this stuff is or who makes it. It probably caught my eye because we have a BASF dye-producing plant here that was formerly known as SUCO aka Standard Ultramarine Company. Interestingly perhaps, is the local president of the company was named Dourif. Maybe some of you know who Brad Dourif is? The first time I saw him, he played the role of Billy Bibbit in the 1975 film One Flew Over the Cuckoo's Nest. I think his father was the Mr. Dourif who ran SUCO.

Also, it is somewhat like Mercedes to have another german company private label this product for them.

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post #6 of 24 (permalink) Old 06-30-2007, 12:39 AM
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Uh, Musikmann, I think you've had no replies as no one has heard of this stuff. Have been around several MB dealer service shops & have never seen or heard of it...

'87 300E: sold after 11years @ 230k & still on the road somewhere in rural Tennessee.

'94 C220 with 93k totalled 10/06 by hit & run broadsiding monster truck: not a scratch or bruise for me
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post #7 of 24 (permalink) Old 06-30-2007, 03:37 AM
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Over 20 years ago, back in Europe I bought a small bottle of gasoline "atomizer".
That was German fuel additive, that helped to atomize the gasoline and not only increased gas mileage, but also suppose to make starting up the older carburated engine in cold weather much easier.
To make long story short, last time I was cleaning my garage, the bottle was still on the shelf about 1/2 full.
I killed lot of myths about fuels. I restarted parked diesel coach on original 8-years old fuel. I have 2-years old gasoline in my boat, that has open 3/4" vent. That thing actually stink when I used it last time and left some sot around the exhaust, but it run the engine and that's what counts.
The best way to get much higher mpg I know about is to fill up gasoline out of California. That gives about 15% increase.
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post #8 of 24 (permalink) Old 06-30-2007, 03:42 AM
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Coming to think about -gasoline isn't the only fuel I have proved to have myths about.
While being in Bahamas the guide told us, that their "Bahamas mamas" are pretty strong and we should be careful with them.
So when I drunk 8 of them and asked "where is the kick?" she was speechless.
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post #9 of 24 (permalink) Old 06-30-2007, 09:51 AM Thread Starter
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Post More info on MB additive

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Originally Posted by johnamoss
Uh, Musikmann, I think you've had no replies as no one has heard of this stuff. Have been around several MB dealer service shops & have never seen or heard of it
Thanks John,

There have been several posts (loubapache is one guy who mentioned it) about the only 2 MB approved gasoline additives, Chevron Techron and the MB branded one. Even my dealer had not heard of it, but once I gave them the MB number, they found it and ordered some for me. (they use BG products sparingly).

As far as I know, KADE and I are the only members here who seem to know about it. Since they at least mention some of the ingredients on the label: Harmful, Dangerous for the environment - Contains SOLVENT NAPTHA, NAPHTALEN. Chevron tells us nothing about the active ingredients, by the way.

Now that you guys know what's in it, do you have any comments?

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post #10 of 24 (permalink) Old 06-30-2007, 09:54 AM Thread Starter
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Question CA gasoline

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Originally Posted by Kajtek1
...The best way to get much higher mpg I know about is to fill up gasoline out of California. That gives about 15% increase.
The only things I think I know about California gas is that it contains oxygenates and high test is limited to 91. What else is there about it to increase MPG by that high a percentage?

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