WJM Posted March 28, 2018 Report Share Posted March 28, 2018 (edited) I drew off some diesel from the bottom of the tank recently. As expected, there was a layer of 'gunk'. But it has settled for a few days now and I notice that the stuff at the top is, how shall I say... less 'red wine' and more 'Gazpacho soup'. Is there something wrong? I should mention - I dose every fill very heavily with Marine 16. Edited March 28, 2018 by WJM Link to comment Share on other sites More sharing options...
Sea Dog Posted March 28, 2018 Report Share Posted March 28, 2018 15 minutes ago, WJM said: I should mention - I dose every fill very heavily with Marine 16. That's probably what it is then... Link to comment Share on other sites More sharing options...
jake_crew Posted March 28, 2018 Report Share Posted March 28, 2018 Clearly, the black sludge at the bottom is what you DONT want. You may want to consider having the tank completely emptied and cleaned if possible - and your fuel polished. When was this done last ? Link to comment Share on other sites More sharing options...
Boat&Bikes Posted March 28, 2018 Report Share Posted March 28, 2018 Well isn’t the diesel colour above the sludge just as it should be? Hard to tell in picture. Plastic container makes it hard to tell. There isn’t that much sludge pulled out,assuming you did a decent job of getting the majority out! Link to comment Share on other sites More sharing options...
OldGoat Posted March 28, 2018 Report Share Posted March 28, 2018 Don't panic - The dye is only there as an indicator and IME can vary - as I have noticed. It's the invisible tracers in the fuel that The Revenue use to prosecute you - if you've been naughty!! Link to comment Share on other sites More sharing options...
WJM Posted March 28, 2018 Author Report Share Posted March 28, 2018 Thanks for the replies. The tank was last cleaned about 400 engine hours ago. White diesel is transparent so I was expecting the red to be similar. What I have here is very opaque. Link to comment Share on other sites More sharing options...
zenataomm Posted March 28, 2018 Report Share Posted March 28, 2018 10 minutes ago, WJM said: Thanks for the replies. The tank was last cleaned about 400 engine hours ago. White diesel is transparent so I was expecting the red to be similar. What I have here is very opaque. Interesting assumption you made there. White wine is transparent, do you expect red wine to be? Link to comment Share on other sites More sharing options...
WJM Posted March 28, 2018 Author Report Share Posted March 28, 2018 3 minutes ago, zenataomm said: Interesting assumption you made there. White wine is transparent, do you expect red wine to be? Ok, let me try again. If you shine a torch through red wine, light will travel through it. If you shine a torch through tomato soup it won't. What should red diesel be like? Link to comment Share on other sites More sharing options...
zenataomm Posted March 28, 2018 Report Share Posted March 28, 2018 Gazpacho 1 Link to comment Share on other sites More sharing options...
rusty69 Posted March 28, 2018 Report Share Posted March 28, 2018 (edited) Bless you! Edited March 28, 2018 by rusty69 ! Link to comment Share on other sites More sharing options...
Dr Bob Posted March 28, 2018 Report Share Posted March 28, 2018 38 minutes ago, WJM said: Thanks for the replies. The tank was last cleaned about 400 engine hours ago. White diesel is transparent so I was expecting the red to be similar. What I have here is very opaque. Red diesel should be transparent. If yours is opaque, it has a suspension of something in it.....but maybe you are confusing the opaqueness coming from looking through the plastic. Have you poured some in a glass or glass bottle and looked at it? Dunno if the marine 16 would make it opaque though. Can you pour some in a glass and take a pic? If it is opaque leave it for a few days or a week and take another pic to see if anything is settling out. Link to comment Share on other sites More sharing options...
magpie patrick Posted March 28, 2018 Report Share Posted March 28, 2018 From Budgens in Marlborough - fresh red diesel Link to comment Share on other sites More sharing options...
BEngo Posted March 28, 2018 Report Share Posted March 28, 2018 Red (all) diesel goes cloudy when it contains a lot of dissolved water. Since Marine 16 is supposed (inter alia ) to help your diesel dissolve water (so there is no water/fuel interface for the bug to live at) I am not surprised by the colour. However, if when examined in a clear glass container, the fuel the sample shown by the OP does not appear bright I would not put it into an engine that was going to stand unused for any length of time. A continuous runner, or a heater, yes. In the immortal words of the Bergius company " Oil having fine sediment in suspension has a dull appearance, but clean oil is brilliant even though dark in colour." N Link to comment Share on other sites More sharing options...
john6767 Posted March 28, 2018 Report Share Posted March 28, 2018 4 minutes ago, BEngo said: Red (all) diesel goes cloudy when it contains a lot of dissolved water. Since Marine 16 is supposed (inter alia ) to help your diesel dissolve water (so there is no water/fuel interface for the bug to live at) I am not surprised by the colour. However, if when examined in a clear glass container, the fuel the sample shown by the OP does not appear bright I would not put it into an engine that was going to stand unused for any length of time. A continuous runner, or a heater, yes. In the immortal words of the Bergius company " Oil having fine sediment in suspension has a dull appearance, but clean oil is brilliant even though dark in colour." N I think you have the the wrong way round Marine 16 is a demulsifier, it is FuelSet that is an emulsifier. So with Marine 16 you should exepct to find water in the bottom of that tank if it is doing its job and separating the water out. Link to comment Share on other sites More sharing options...
WotEver Posted March 28, 2018 Report Share Posted March 28, 2018 6 minutes ago, john6767 said: I think you have the the wrong way round Marine 16 is a demulsifier, it is FuelSet that is an emulsifier. So with Marine 16 you should exepct to find water in the bottom of that tank if it is doing its job and separating the water out. As far as I can see, it’s neither. It’s a biocide. The instructions appear to instruct you to use a separate water separator. http://www.marine16.co.uk/acatalog/Battle of the Diesel Bug.pdf Link to comment Share on other sites More sharing options...
WJM Posted March 28, 2018 Author Report Share Posted March 28, 2018 I am using the Marine 16 Diesel Fuel Complete product. http://www.marine16.co.uk/acatalog/Diesel-Fuel-Complete-500ml-60.html#SID=5 Link to comment Share on other sites More sharing options...
WotEver Posted March 28, 2018 Report Share Posted March 28, 2018 Their ‘Diesel Fuel Complete’ is (amongst other things) a demulsifier. http://www.marine16.co.uk/acatalog/Diesel-Bug-Treatment-Price-Comparison-2013.pdf Snap! Link to comment Share on other sites More sharing options...
Paringa Posted March 28, 2018 Report Share Posted March 28, 2018 (edited) I thought Marine16 was a biocide or is it their complete that also has a emulsifying agent? Happy to be corrected... As for the OP, when did you last fill up? Have all your diesel users been okay running so far? If yes, I would just carefully pop it back into the tank through a filter of some kind, disposing of the last litre or so of gunk. If you decant a sample into a see through container and you are not happy with the contents, you then have to make the decision of what to do with a tank of fuel as I can only presume it will look like that throughout. Just my thoughts Edited March 28, 2018 by Paringa Crikey you lot are quick... Link to comment Share on other sites More sharing options...
WJM Posted March 28, 2018 Author Report Share Posted March 28, 2018 4 minutes ago, Paringa said: As for the OP, when did you last fill up? Have all your diesel users been okay running so far? If yes, I would just carefully pop it back into the tank through a filter of some kind, disposing of the last litre or so of gunk. Last filled up in January. Plenty of engine hours since and the diesel stove is running normally. Link to comment Share on other sites More sharing options...
Momac Posted March 28, 2018 Report Share Posted March 28, 2018 4 hours ago, Paringa said: I thought Marine16 was a biocide or is it their complete that also has a emulsifying agent? Happy to be corrected... Marine 16 make more than one fuel treatment product. http://www.marine16.co.uk/ . Link to comment Share on other sites More sharing options...
john6767 Posted March 28, 2018 Report Share Posted March 28, 2018 23 minutes ago, MartynG said: Marine 16 make more than one fuel treatment product. http://www.marine16.co.uk/ . Yes there are multiple products, I was not specific, it was Deisel Fuel Complete that I was saying is a demulsifier. Isn’t that the most common one available in boat yards and what people use as a regular treatment. Link to comment Share on other sites More sharing options...
Momac Posted March 28, 2018 Report Share Posted March 28, 2018 I have used marine 16 diesel fuel complete and it does make any water drop out . It certainly doesn't make the fuel cloudy. Link to comment Share on other sites More sharing options...
john6767 Posted March 28, 2018 Report Share Posted March 28, 2018 2 minutes ago, MartynG said: I have used marine 16 diesel fuel complete and it does make any water drop out . It certainly doesn't make the fuel cloudy. I found that I got a lot more water in the bottom of the fuel tank when using I, so I believe it does what it says, but you need to clean the bottom of the tank more often than when you use FuelSet. That was my analysis anyway. Link to comment Share on other sites More sharing options...
Momac Posted March 28, 2018 Report Share Posted March 28, 2018 1 minute ago, john6767 said: you need to clean the bottom of the tank more often than when you use FuelSet. True. I have obtained some new fuel treatment for this year - which works like fuel set . I have not added any fuel so haven't used it yet. Link to comment Share on other sites More sharing options...
Naughty Cal Posted March 29, 2018 Report Share Posted March 29, 2018 10 hours ago, MartynG said: True. I have obtained some new fuel treatment for this year - which works like fuel set . I have not added any fuel so haven't used it yet. What has made you switch from Marine 16? Link to comment Share on other sites More sharing options...
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