Reply
 
Thread Tools Search this Thread Display Modes
 
Old 08-15-2019, 07:41 PM   #1
Veteran Member
 
Trawler_traveler's Avatar
 
City: Currently Oxnard, Ca.
Country: Where the anchor is
Vessel Name: LAGOM
Vessel Model: Willard 40' Pilothouse
Join Date: Mar 2017
Posts: 40
Refresh biocide ?

Should one re-add biocide to diesel that has been sitting for a year since the last biocide treatment or does the biocide stay effective indefinitely ?

Thanks,



-Sven
__________________
Advertisement

Trawler_traveler is offline   Reply With Quote
Old 08-15-2019, 10:43 PM   #2
Guru
 
syjos's Avatar
 
City: Gig Harbor
Country: USA
Vessel Name: Sandpiper
Vessel Model: Bluewater 40 Pilothouse Trawler
Join Date: Nov 2012
Posts: 691
I would retreat after one year.

I think most biocide is effective one year.

Cheap insurance.
__________________

syjos is offline   Reply With Quote
Old 08-15-2019, 10:58 PM   #3
Guru
 
Comodave's Avatar
 
City: Au Gres, MI
Country: US
Vessel Name: Never Say Never
Vessel Model: President 41 DC
Join Date: Jul 2015
Posts: 5,039
I have not refueled this year since I want to run the fuel level down to replace a fuel tank. I will still treat the fuel at the end of the season.
__________________
Boat Nut:
If you are one there is no explanation necessary.
If you arenít one, there is no explanation possible.
Comodave is offline   Reply With Quote
Old 08-16-2019, 02:32 AM   #4
Guru
 
BruceK's Avatar
 
Join Date: Oct 2011
Posts: 9,812
Good idea, but how to mix it through the fuel?
Refueling, I add the magic additive and then pump in the diesel so it gets mixed in, but what method works with a refresh? Maybe dilute it into 10 liters and add that?
__________________
BruceK
Island Gypsy 36 Europa "Doriana"
Sydney Australia
BruceK is offline   Reply With Quote
Old 08-16-2019, 05:08 AM   #5
Senior Member
 
Boat's Avatar
 
City: SchoolHouse Branch
Country: USA
Join Date: Jul 2018
Posts: 439
Posting this as point of interest and for verification, not as fact. Way back when, I was told that regular gas is more poisonous than biocide and would serve the same purpose.

Ever heard such a thing? Is it so?

The story was that, a couple times a year, old timers would add a gallon of regular to their diesel.

Today's gas is not the same batch of chemicals. If I did this I would definitely use the alcohol-free gas. Still wouldn't feel good about it.
Boat is offline   Reply With Quote
Old 08-16-2019, 08:32 AM   #6
Senior Member
 
greysailor's Avatar
 
City: Matagorda Bay
Country: Republic of Texas - USA
Vessel Name: Salty
Vessel Model: 2005 Defever 44
Join Date: May 2013
Posts: 192
Quote:
Originally Posted by Boat View Post
Posting this as point of interest and for verification, not as fact. Way back when, I was told that regular gas is more poisonous than biocide and would serve the same purpose.

Ever heard such a thing? Is it so?

The story was that, a couple times a year, old timers would add a gallon of regular to their diesel.

Today's gas is not the same batch of chemicals. If I did this I would definitely use the alcohol-free gas. Still wouldn't feel good about it.
I'd be reluctant to add gas to my diesel tanks for several reasons. Other than the obvious safety aspect, today's US diesel has lower lubricity than ever before....thinning your diesel down even more won't be a friend to your injector pumps.
__________________
Fair winds,
Luke
greysailor is offline   Reply With Quote
Old 08-16-2019, 09:18 AM   #7
Guru
 
Comodave's Avatar
 
City: Au Gres, MI
Country: US
Vessel Name: Never Say Never
Vessel Model: President 41 DC
Join Date: Jul 2015
Posts: 5,039
Quote:
Originally Posted by BruceK View Post
Good idea, but how to mix it through the fuel?
Refueling, I add the magic additive and then pump in the diesel so it gets mixed in, but what method works with a refresh? Maybe dilute it into 10 liters and add that?
I think that would work.
__________________
Boat Nut:
If you are one there is no explanation necessary.
If you arenít one, there is no explanation possible.
Comodave is offline   Reply With Quote
Old 08-16-2019, 10:35 AM   #8
Guru
 
syjos's Avatar
 
City: Gig Harbor
Country: USA
Vessel Name: Sandpiper
Vessel Model: Bluewater 40 Pilothouse Trawler
Join Date: Nov 2012
Posts: 691
I think that if you pour biocide into the tank, it would over time get mixed with boat motion.

I run the priming/balancing pump to circulate the fuel after adding biocide.

A polishing system would do the same thing.

I try to use up fuel by the end of the boating season and keep less than 50 gallons over the winter, until I purchase fuel in the spring.
syjos is offline   Reply With Quote
Old 08-17-2019, 05:48 AM   #9
FF
Guru
 
FF's Avatar
 
Join Date: Oct 2007
Posts: 19,508
The big fear with an old diesel fuel tank is crud breaking loose and screwing up the fuel system.


Adding a solvent like gasoline will speed up the process of breaking loose the dead bugs and asphaltine.
__________________

FF is online now   Reply With Quote
Reply

Tags
biocide, diesel

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off





All times are GMT -5. The time now is 06:42 AM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2006 - 2012