diesel

a mix that virtually eliminates any possibility of degradation / getting the bug and is cheaper for them to buy.
.
Sounds like HVO . Not sure about the cheaper bit but if it is cheaper then it may be very popular.
 
Yep, see my post #16
100%
"I thought most marine diesel was Fame free, Princess wisely put sumps and drain cocks on the fuel tanks so fuel hygiene not a problem. Fuel levels all over the place through winter over last 6 years and not found a drop of water, don’t use additives either, works for me . "

.....mind you our boat is in use virtually all year round.
Have just brimmed the tanks, still 2 or 3 trips out planned before this year is out.
 
This 'FAME free' stuff is a red herring. The red will be ULSD and it's stability is poor. There is a ton of evidence that ULSD is less stable, but almost none that FAME has any effect unless you have free water (if you have scientific papers I'd love to be given the references).
 
Another thing to consider which might bowl a few out diesel contamination wise is the quality of the fill up .
I mean think of the “ bug “ as a contagious disease .

This summer we pulled into a marina on speck as I was anchored nearby and could see right in , eyeball the fuel jetty near the entrance.
Our own gets busy on WE s .Hire boats topping up at the end of the day etc .

Got along side , lines secure etc and the bloke told ( Italian student kid studying in California so good eng ) us they were expected a delivery later that day and the stuff @ the bottom of his tanks was possibly not good and they were having them “ cleaned “ Can you come back tomorrow he advised .
He was fully up up speed with the “ bug “ issues . I wanted excess of 1200L

I was on a 1/4 so no worries . We elegantly departed empty handed .

Anyhow I thought that was good of him .

You just don’t know the state of the stations tanks , the levels how far off the dredges your load is , the age , any water ingress issues know or unknown.
Of course in the summer there is a hopefully a rapid turn over , but nether the less you never know .
Hence i dose mine every fill .

At la Nap they had a fuel bug barge that worked the local marinas in the bay of Cannes .
Once I went out and came back to find it in my berth “ doing the neighbours” S/Sker Camargue.
I went to the visitor s until they left .Guy told me they were busy .It was like a big rib with pumps , pipe a vacuum thingy and three tanks .They suck it out and pass it through the 3 tanks presume filtering as they go .Then somehow steam clean / chemical clean the boats tank , then refill it from the rib ……..then fire up the motors and a helluva lot of filter changes .

Alarmingly this was high season so semi contradictory to the rapid turnover theory ?

Makes you think doesn’t it someone’s running a viable business out of this “ bug “ misery .
 
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