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Posted By Discussion Topic: Additive

Similar Threads That Might Help :
Petrol engine fuel additive ?| oil additives| Diesel Bug and additives|

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MandA
Mar-20-2022 @ 5:32 PM                           Permalink
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What additive for diesel do members recommend if any.
Adrian.

MandA

ADI
Mar-20-2022 @ 9:16 PM                           Permalink
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I have used 'marine 16' with no problems or side effects

Regards

Adrian  Michelle

Beck  Braydon and Mere.

ADI
Mar-20-2022 @ 9:25 PM                           Permalink
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I got mine from Ebay, well packed and free 3 day postage.marine 16 diesel treatment

Regards

Adrian  Michelle

Beck  Braydon and Mere.

JollyRodger
Mar-20-2022 @ 9:29 PM                           Permalink
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I'm told that cooking oil is an admirable additive.

Jolly Roger

Paladine
Mar-20-2022 @ 12:19 AM                           Permalink
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Any choice of additive surely depends on the age of the engine and the effect that is desired. A modern engine is designed to run on currently available fuel, so shouldn’t need any additive to compensate for the ultra-low sulphur (ULS) content. Diesel bug, however, is related to the condition of the fuel, rather than the fuel itself. It lives and grows on the interface between the diesel and any water in the tank. The problems arise when it dies and forms a sludge which can choke lines and filters.

Taking the two issues separately:

1. Diesel bug and biodiesel

Biodiesel, which most of the yards sell, contains FAME (Fatty Acid Methyl Esters) which can bring its own problems. You can find out more by searching t’internet, for example https://www.oilfast.co.uk/fame-concern/ , but the principal points of concern are waxing in cold weather, residual depositing causing clogging, water contamination due to the hygroscopic nature of the fuel, degradation of the fuel over time (important when used in boats which don’t have much of a turn-a-round of fuel) and the degradation of the rubber used in the lines and seals of older engines (modern engines have replaced rubber with a material which is not so affected).

My engine is getting on for 40 years old and was built well before the low and ultra-low sulphur bio-diesel was introduced, so I avoid any possible problems with disintegrating lines/seals by using non-bio diesel. There are about three yards that still sell it.

The boat is of a similar age and, during the 14 years I have owned it, I have always used Soltron in the fuel tank, which is said to emulsify any water in the fuel, so that it is burnt in the cylinders rather than collecting in the bottom of the tank. I have used water-finding paste to check the tank, and am confident there is not a water layer lurking in the bottom of it, so it seems to work. There are other additives which claim to do a similar job, but I haven’t tried them. It also pays to keep the fuel tank topped-up, to reduce the amount of possible condensation in the tank.

2. Ultra-low sulphur content.

The sulphur in diesel fuel provides lubricity. Reducing the sulphur to reduce harmful emissions resulted in less lubricity being provided by the fuel. Once again, modern engines are designed to run on the ULS fuel, my old one wasn’t.  So I add low-ash two-stroke mineral oil to my fuel tank, in a ratio of 200:1 fuel to oil, to replace someof the lost lubricity.

I did quite a bit of research before settling on these two additives, which I have been using for decades. Other will have different opinions about what additives to use, and even whether additives are of any use at all. What works for one may not work for someone else.




Been hit by another boat? Report the incident to the Marine Accident Investigation Branch’s dedicated accident reporting line on 023 8023 2527 which is monitored 24 hours a day.  Help to make the Broads safer.

Dilligaf
Mar-21-2022 @ 10:17 AM                           Permalink
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I've used marine 16 bug treatment for a few years now, I also use their diesel fuel complete if the fuel will be hanging around a while, the diesel in my tanks at the moment was mostly from 2019 due to covid but has had a good dose up at the start of each lockdown to try and avert problems.
If it's good enough for the RNLI it's good enough for me.

Dave.
Formerly 'LeoMagill'

Paladine
Mar-21-2022 @ 12:19 PM                           Permalink
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MandA, you might be interested in this PBO test of several additives https://www.pbo.co.uk/gear/12-diesel-bug-treatments-tested-43353

7 biocides (like Marine16) and 5 dispersants (like Soltron) were tested. As you can see there was no clear winner, but it seems that adding something to prevent/remove diesel bug is preferable to doing nothing.

Just to complicate matters further, the yard from which I purchase my FAME-free diesel doses their tank with a Miller product, which hasn't been mentioned yet.

Been hit by another boat? Report the incident to the Marine Accident Investigation Branch’s dedicated accident reporting line on 023 8023 2527 which is monitored 24 hours a day.  Help to make the Broads safer.

Dzign
Mar-21-2022 @ 2:27 PM                           Permalink
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Is it OK to use Redex in 20+year old marine engines I know it's not advisable for modern car engines but wondered if it was any advantage in older marine engines?

L

Paladine
Mar-21-2022 @ 2:47 PM                           Permalink
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Dzign, from where do you get the notion that Redex shouldn't be used in modern engines? According to the manufacturer, it's safe to use in any petrol or diesel engine. Read for yourself https://www.holtsauto.com/redex/support/can-redex-cause-damage-car/

Bear in mind that it is sold as an engine cleaner (internally) and is not claimed to have any effect on diesel bug.

Been hit by another boat? Report the incident to the Marine Accident Investigation Branch’s dedicated accident reporting line on 023 8023 2527 which is monitored 24 hours a day.  Help to make the Broads safer.

annville
Mar-21-2022 @ 3:59 PM                           Permalink
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Hi Manda First thing is to use FAME free diesel second how old is your engine and what make, has injector pump been overhauled recently,ie how old and what type of seals does it have. John

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