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Old 07-26-2016, 04:43 AM   #21
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Default Re: Water in Fuel Light WIF warning is on.

That yellow Water in fuel sign used to come on so often in my truck I called it the big brother watching , it was not fun going in limp mode each and every time !!!! There was never any water in the system but rather a short in the wire harness somewhere that later developed both high and low engine oil pressures faulty warnings !
Had the engine wire harness replaced and big brother never came on since . I still get nightmares just thinking about it
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Old 07-27-2016, 03:40 PM   #22
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Default Re: Water in Fuel Light WIF warning is on.

Hello All,

I'm new to the forum so if this question belongs elsewhere please advise.

I just purchased a 2017 Winnebago/Itasca Navion, MB 6 cyl., 3.0L. My question is: Are any of you using a fuel additive to prevent algae growth. I'm in Florida and as you know its hot and humid a climate ripe for the growth of fuel tank algae. Hopefully the tank is new and free of any growth and I would like to keep it that way from the get go.

MB has a recommendation but you can only get it in Europe. I called my local MB dealer and they could not help. If any of you are using a preventative in a newer unit can you please share the name and/or any suggestions could you please share.

Thanks in advance.
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Old 07-27-2016, 03:45 PM   #23
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Default Re: Water in Fuel Light WIF warning is on.

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Originally Posted by VietVet View Post
MB has a recommendation but you can only get it in Europe.
Can you document this? As far as I am aware, MB explicitly forbids all fuel additives except for wintertime anti-gel.
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Old 07-27-2016, 03:54 PM   #24
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Default Re: Water in Fuel Light WIF warning is on.

Any biocide designed for diesel should work. Most only need 1oz for 20 gallons or so. There is minimal safety concerns with that amount of additive.

You do not need to use a biocide continuously. If you are having no symptoms, and your filler cap has no microbial build up, you do not likely need any. The occasionally dosing with a new tank of fuel cannot hurt though.

Keeping your tank completely full during storage, and filling from well used stations is the best method to prevent microbial growth. The fungi/bacteria actually grow in liquid water that accumulates in the tank. No water, no microbial growth.
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Last edited by Midwestdrifter; 07-27-2016 at 04:00 PM.
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Old 07-27-2016, 04:13 PM   #25
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Default Re: Water in Fuel Light WIF warning is on.

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Originally Posted by avanti View Post
Can you document this? As far as I am aware, MB explicitly forbids all fuel additives except for wintertime anti-gel.
They don't forbid additives as a blanket statement. BeVo says secondary additives are not cost effective or generally necessary.

BeVo lists Grotamar as a biocide which is only available in Europe to my knowledge.

As Midwestdrifter indicated, there are many good quality tried and true commercial additives available, but they are not on the BeVo list. Most boating sites will have reviews to help selection.

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Last edited by Aqua Puttana; 07-27-2016 at 04:39 PM. Reason: Grotamar 71
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Old 07-27-2016, 04:45 PM   #26
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Default Re: Water in Fuel Light WIF warning is on.

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Originally Posted by Aqua Puttana View Post
They don't forbid additives as a blanket statement. BeVo says secondary additives are not cost effective or generally necessary.
Well, MB is not known for absolute global consistency, but FWIW:

2016 US Sprinter Operator's Manual, P 278:

Quote:
...do not use any special additives. This can otherwise lead to engine damage. This does not include flow improver additives. For further information, see "Flow improvers".
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Old 07-27-2016, 05:21 PM   #27
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Default Re: Water in Fuel Light WIF warning is on.

In one of their (MB) directives they given an OK to Grotamar71 and Grotamar82 both are sold only in Europe and not available here in the U.S.. Contacted a supplier in England but he said he could not ship it to the U.S.. Spoke to the firm that manufacturer and said they hope to have it available in U.S. in the future.

Thanks to all who have given suggestions and information, all suggestions are well received. As I mentioned in my initial post, I want to start without issue, the units new and I want to keep it that way.

@avanti, Thanks for the Operator Manual info I'll check it out.
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Old 08-01-2016, 08:44 PM   #28
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Default Re: Water in Fuel Light WIF warning is on.

Quote:
Originally Posted by avanti View Post
Well, MB is not known for absolute global consistency, but FWIW:

2016 US Sprinter Operator's Manual, P 278:


We all quote the documentation which supports our beliefs.

I feel that there are aftermarket additives which do have some value. I use my ASSYST oil change interval. Some don't believe Mother Mercedes and change their oil more frequently than it recommends officially in their operator manual.

I view many things in the Operator Manual as a dumbed down guide as compared to the detail found in BeVo.

There are worse things to follow though. Some of the facts/advice as quoted from dealership car salesmen comes to mind.

But there are already many additive threads. Back to the sticky Water in Fuel Light topic.

vic
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Last edited by Aqua Puttana; 08-01-2016 at 08:48 PM.
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Old 09-03-2016, 02:24 PM   #29
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Default Re: Water in Fuel Light WIF warning is on.

Where is this sensor?

I just bought an NCV3 and this light came on yesterday and won't go away.

I've never had a water in fuel issue with my other Sprinter. Water in anything is not a big deal when you live in the high desert. Stuff is DRY here!!

This new to me van got filled at the same pump as the other van and was driven all day yesterday, water in fuel light only coming on at 5pm on the way home. The van has some other issues I'm working on sorting out and has some corrosion on stuff. So I'm more suspect of a bad sensor or connection than actual water in the fuel.....though this tank is almost totally empty right now too.

Last edited by Cole; 09-03-2016 at 02:44 PM.
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Old 01-11-2017, 02:43 PM   #30
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Default Re: Water in Fuel Light WIF warning is on.

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Originally Posted by Cole View Post
Where is this sensor?

...
I didn't know that this question was left hanging.

To my knowledge, all MB WIF sensors are installed or integral to the OEM style fuel filter. The NCV3 fuel filters that are more expensive than others have an integral non-replaceable WIF sensor.

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"My opinion and worth everything you'll never pay for it." assumed.
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16 ounces of unnecessary prevention can be worth a pound of manure.
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