Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Search this Thread Rate Thread Display Modes
Old 29-03-2019, 09:29   #1
Marine Service Provider
 
O_salt's Avatar

Join Date: Sep 2010
Location: Bellevue, Wa.
Boat: Beneteau, First 47.7, 48.5', Flyer
Posts: 40
Adding oil to diesel fuel?

A friend of mine has bought a new Volvo diesel engine and the salesman / Installer is telling him to add 1% 2-stroke motor oil to his diesel fuel to help lubricate the engine.

Has anybody else ever heard of this?
__________________

O_salt is offline   Reply With Quote
Old 29-03-2019, 09:44   #2
Registered User
 
MartinR's Avatar

Join Date: Feb 2015
Location: Sweden, boat in Greece
Boat: 73ŽULDB custom ketch
Posts: 980
Re: Adding oil to diesel fuel?

Quote:
Originally Posted by O_salt View Post
A friend of mine has bought a new Volvo diesel engine and the salesman / Installer is telling him to add 1% 2-stroke motor oil to his diesel fuel to help lubricate the engine.

Has anybody else ever heard of this?
__________________

MartinR is offline   Reply With Quote
Old 29-03-2019, 09:46   #3
Registered User

Join Date: Oct 2007
Location: Isla Saboga, Las Perlas, Panama
Boat: 1994 Hunter 37.5
Posts: 245
Re: Adding oil to diesel fuel?

I've heard about using it for gasoline engines to help lubricate the valve stems. I suppose you would also get some additional lubrication of the upper piston rings during break-in. It can't hurt, but not sure how much it will actually help.
oldjags is offline   Reply With Quote
Old 29-03-2019, 10:16   #4
rbk
Registered User
 
rbk's Avatar

Join Date: Feb 2016
Location: Canada
Boat: T37
Posts: 1,869
Re: Adding oil to diesel fuel?

Common on 2 stroke for break in (oil injected plus adding to the fuel) It may be legit but i'd double check with volvo mechanic to be sure.
rbk is offline   Reply With Quote
Old 29-03-2019, 11:02   #5
Registered User

Join Date: Oct 2018
Location: Kansas City, MO
Posts: 5
Re: Adding oil to diesel fuel?

I've heard of additives to restore some of the lubricity to the new formulations of Ultra-low Sulfur Diesel Fuel but haven't heard of 2-stoke oil. I guess it would make sense since it is a lubricant that is meant to be burnt in the engine and since the marine engines don't have DPF or catalysts to worry about then I can't really see the harm - but I'd read the manual and see what it recommends.



If you haven't heard about the ULSD and Lubricity here's a quick article I found : https://fueloilnews.com/2010/03/04/t...-of-lubricity/


Stanadyne and PowerService are 2 brands that should be commonly available (at least in the US since your profile says you're in WA) that have added lubrication for diesel fuels if he would rather use something designed for diesel engines specifically.
bwiencek is offline   Reply With Quote
Old 29-03-2019, 11:30   #6
Registered User
 
Dsanduril's Avatar

Join Date: Aug 2011
Location: Petersburg, AK
Boat: Outremer 50S
Posts: 3,152
Re: Adding oil to diesel fuel?

Well, the manual for my brand new Volvo engines says:

Quote:
Additives
...
NOTICE! It is not allowed to add secondary treatment additives ("diesel boosters"), lubricants, gasoline, or alcohol into the fuel tank.
The manual further specifies that fuel lubricity match a maximum wear scar of 520 micrometers - which is coincidentally the same value used in the definitions for ULSD.

So, I'd ask the mechanic if he's going to personally warranty the engine by recommending a practice specifically forbidden in the owner's manual.
Dsanduril is offline   Reply With Quote
Old 29-03-2019, 11:44   #7
Senior Cruiser
 
newhaul's Avatar

Cruisers Forum Supporter

Join Date: Sep 2014
Location: puget sound washington
Boat: 1968 Islander bahama 24 hull 182, 1963 columbia 29 defender. hull # 60
Posts: 8,577
Re: Adding oil to diesel fuel?

Quote:
Originally Posted by O_salt View Post
A friend of mine has bought a new Volvo diesel engine and the salesman / Installer is telling him to add 1% 2-stroke motor oil to his diesel fuel to help lubricate the engine.

Has anybody else ever heard of this?
a friend of mine owns Skagit injection services and builds race semis and he says to always do that it helps lubricate the injection pump and injectors as well as increasing the cetane value of diesel fuel.
I did it for hundreds of thousands of miles never had any negative issues becides its cheaper than cetane fuel additives.
__________________
Non illigitamus carborundum
newhaul is offline   Reply With Quote
Old 29-03-2019, 11:58   #8
Registered User

Join Date: Oct 2007
Location: Isla Saboga, Las Perlas, Panama
Boat: 1994 Hunter 37.5
Posts: 245
Re: Adding oil to diesel fuel?

Quote:
Originally Posted by Dsanduril View Post
Well, the manual for my brand new Volvo engines says:



The manual further specifies that fuel lubricity match a maximum wear scar of 520 micrometers - which is coincidentally the same value used in the definitions for ULSD.

So, I'd ask the mechanic if he's going to personally warranty the engine by recommending a practice specifically forbidden in the owner's manual.
A lot of manufacturers used to (maybe still do?) specify that you had to use their brand of lubricants and filters or else the warranty was void. It was just a ploy to help sell their over-priced private-label stuff. But, who wants to take the chance that a warranty claim might get denied because you used Mercruiser oil or some generic equivalent in your Johnson outboard?
oldjags is offline   Reply With Quote
Old 29-03-2019, 12:31   #9
Registered User
 
Dsanduril's Avatar

Join Date: Aug 2011
Location: Petersburg, AK
Boat: Outremer 50S
Posts: 3,152
Re: Adding oil to diesel fuel?

In some of the US we now have "right to repair" laws that specifically prohibit manufacturers from this practice. Driven in part by John Deere and Apple setting prohibitively high prices on parts, labor, and repairs.

But this isn't a case of using something from the manufacturer, it's a case of the local representative recommending a practice that is specifically called out as not allowed in the manual put out by the corporation. While the practice may be anecdotally (or even empirically or scientifically) quite sound, I'd still question it when the salesman for the company is espousing a practice in direct conflict with the company line. At the very least I'd ask him to put the recommendation in writing on company letterhead.
Dsanduril is offline   Reply With Quote
Old 29-03-2019, 12:32   #10
Marine Service Provider
 
O_salt's Avatar

Join Date: Sep 2010
Location: Bellevue, Wa.
Boat: Beneteau, First 47.7, 48.5', Flyer
Posts: 40
Re: Adding oil to diesel fuel?

Quote:
Originally Posted by Dsanduril View Post
Well, the manual for my brand new Volvo engines says:



The manual further specifies that fuel lubricity match a maximum wear scar of 520 micrometers - which is coincidentally the same value used in the definitions for ULSD.

So, I'd ask the mechanic if he's going to personally warranty the engine by recommending a practice specifically forbidden in the owner's manual.
Hi, we are talking about a D2, could you direct us to where in the manual we would find this additive section.

When we asked the mechanic if he was endorsing this for Volvo, he did not say yes, said he would get the person from Volvo who told him about this.
O_salt is offline   Reply With Quote
Old 29-03-2019, 12:39   #11
Registered User
 
MartinR's Avatar

Join Date: Feb 2015
Location: Sweden, boat in Greece
Boat: 73ŽULDB custom ketch
Posts: 980
Re: Adding oil to diesel fuel?

This is an environmentally bad procedure without any benefits. So, why do it? ULSD has good enough lubrication for modern diesel engines. There are already additives in the fuel. At least in Europe.

If you run your diesel engine on Kerosene, I could understand this.
MartinR is offline   Reply With Quote
Old 29-03-2019, 12:39   #12
Registered User
 
foboss's Avatar

Join Date: Jan 2019
Boat: Scanmar 33
Posts: 43
Re: Adding oil to diesel fuel?

The Vetus manual describes a method of preserving the engine for winter storage, where engine oil is added to the fuel.
On my Kia Sorento, I added oil to the fuel several times, I did not notice the difference.
foboss is offline   Reply With Quote
Old 29-03-2019, 12:45   #13
Registered User
 
Delfin's Avatar

Join Date: Aug 2010
Location: Anacortes, WA
Boat: 55' Romsdal
Posts: 2,096
Re: Adding oil to diesel fuel?

You might look at OptiLube XL for a relatively inexpensive, but purpose designed lubricity improver. Here are the lab tests: https://opti-lube.com/downloads/intertektesting.pdf
__________________
https://delfin.talkspot.com
I can picture in my head a world without war, a world without hate. And I can picture us attacking that world, because they'd never expect it. - Jack Handey
Delfin is offline   Reply With Quote
Old 29-03-2019, 13:48   #14
Registered User
 
Dsanduril's Avatar

Join Date: Aug 2011
Location: Petersburg, AK
Boat: Outremer 50S
Posts: 3,152
Re: Adding oil to diesel fuel?

Quote:
Originally Posted by O_salt View Post
Hi, we are talking about a D2, could you direct us to where in the manual we would find this additive section.

When we asked the mechanic if he was endorsing this for Volvo, he did not say yes, said he would get the person from Volvo who told him about this.
Mine is a D2 as well

Operator's Manual D1, D2 publication #47708094, dated 03-2017, Page 79 - Fuel System.
Dsanduril is offline   Reply With Quote
Old 29-03-2019, 14:26   #15
Marine Service Provider

Join Date: Sep 2014
Location: Auckland, NZ
Boat: Compass 790 , 7.9 metres or 26 ft
Posts: 1,620
Re: Adding oil to diesel fuel?

Yes heard of it a few times & I personally think it couldnt hurt & would probably help EXCEPT why risk the warranty?
I would do it if I didn't think my engine is likely to outlast me anyway & could be bothered but I don't have an engine under warranty. Some trucks use filtered used sump oil as a part mix in their diesel so 2 stroke must be ok
Good tip on getting a written recommendation on letterhead paper from rep as Dusandril said in post 9
__________________

Compass790 is offline   Reply With Quote
Reply

Tags
diesel, fuel, oil

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes Rate This Thread
Rate This Thread:

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


Similar Threads
Thread Thread Starter Forum Replies Last Post
SeaTalk/ST2 adding RPM, oil pressure, fuel flow, temperature DITB Marine Electronics 5 04-03-2018 22:32
Changing engine oil adding transmission oil natraps116 Engines and Propulsion Systems 8 27-04-2015 20:24
Adding TCW OIL to diesel fuel to enhance Lubricity Crew of Turning Engines and Propulsion Systems 22 27-02-2014 20:26
Diesel Fuel Tank vs Portable Diesel Fuel Cell GaryMayo Engines and Propulsion Systems 11 13-11-2012 16:47

Advertise Here


All times are GMT -7. The time now is 05:10.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2020, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2020, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.