Cruisers Forum
 


Reply
 
Thread Tools Search this Thread Rate Thread Display Modes
Old 30-11-2019, 12:01   #16
Registered User
 
Simi 60's Avatar

Join Date: Jun 2016
Location: Australia
Boat: Milkraft 60 ex trawler
Posts: 3,450
Re: Adding Used Motor Oil to Diesel Fuel?

Quote:
Originally Posted by roland stockham View Post
The engine may be fine with it but on stray bit of metle can wreck the high pressure pump. Why do you think deisels have multi stage filters? Personally the risk/benift would not be worth it.
How does the stray metal get through?
Why do you think diesels have multi stage filters?
Simi 60 is offline   Reply With Quote
Old 30-11-2019, 12:08   #17
Registered User
 
Simi 60's Avatar

Join Date: Jun 2016
Location: Australia
Boat: Milkraft 60 ex trawler
Posts: 3,450
Re: Adding Used Motor Oil to Diesel Fuel?

Quote:
Originally Posted by SarahBeth View Post
Frankly, I find this attitude both short sighted and offensive. .
Better than tipping it in the ocean via the "magic pipe".
https://en.m.wikipedia.org/wiki/Magic_pipe

As a full time cruiser with no marina and no car, but at next change 100 litres of bypass filtered used oil aboard, how do you propose one gets rid of it?
Simi 60 is offline   Reply With Quote
Old 30-11-2019, 12:09   #18
Registered User

Join Date: May 2016
Location: Land of 100,000 lakes
Boat: Boatless for now, looking!
Posts: 322
Re: Adding Used Motor Oil to Diesel Fuel?

Cummins Marine, for it's larger series use https://www.cummins.com/engines/centinel to burn the old oil, allowing up to 4,000 hr before oil change, in conjunction with https://www.cummins.com/engines/eliminator a multistage filter/centrifuge system. This is for K block engines though, nothing smaller. At least to my reading.
All the best
__________________
Kaos, Panic, Disorder, my work here is done.
Midnight Son is offline   Reply With Quote
Old 30-11-2019, 12:15   #19
Registered User
 
Boatyarddog's Avatar

Join Date: Nov 2014
Location: Olympia, Wa
Boat: 1979 Mariner Ketch 32-Hull 202
Posts: 1,263
Images: 2
Re: Adding Used Motor Oil to Diesel Fuel?

Quote:
Originally Posted by SarahBeth View Post
Frankly, I find this attitude both short sighted and offensive. As sailors, we know better, and first hand, how degradation of the oceans is impacting life on earth. WE are (or should be) its first stewards. That means we need to pay attention to the impacts of our actions on the health of the seas. The Environmental Protection Agency studies these impacts and makes its pronouncements accordingly. So not caring about these regulations - which are based on a desire and duty to PROTECT the oceans - is self-defeating. If you donít care about it for yourself, how about thinking about your children - or the occupants of low-lying kingdoms and countries in Polynesia and elsewhere who are dealing with the impacts of selfish actions now.
Thanks!
Good Folks Everywhere
Keeping oil out of the air and Oceans IS and has always been most important,
4 stroke technology was developed for that purpose.
No reason to back up on preventing pollution.
Cheers,
SV Cloud Duster
Boatyarddog is offline   Reply With Quote
Old 30-11-2019, 12:19   #20
Moderator
 
a64pilot's Avatar

Cruisers Forum Supporter

Join Date: Oct 2013
Location: Jacksonville/ out cruising
Boat: Island Packet 38
Posts: 31,473
Adding Used Motor Oil to Diesel Fuel?

Quote:
Originally Posted by Simi 60 View Post
How does the stray metal get through?
Why do you think diesels have multi stage filters?


The wear metals are of course fine enough to not be caught by an oil filter or they wouldnít be in the oil to start with, but as any oil lab will testify, they are there.

First oil crisis oil was burned with fuel, anything to keep from buying fuel. It did in fact cause wear on the fuel injection system and it cost money, didnít save any, and of course early 70ís those were old fashioned Diesels and no ULSD either.
Fuel filters do not remove every particle that can cause wear, they remove the majority of particles that cause wear, but just for starters there is no normal fuel filter that removes 100% of the particles bigger than itís rated.
Itís a false economy.
I manufactured aircraft, this aircraft was Certified to burn both #1 and #2 Diesel as opposed to Jet, actual field experience proved that the dirtier fuel caused more maintenance in the form of increased fuel nozzle cleanings and cost money, not saved it.
Oil in fuel is the same thing, sounds like a good idea, but itís not.
a64pilot is offline   Reply With Quote
Old 30-11-2019, 12:24   #21
Registered User
 
Cadence's Avatar

Join Date: Dec 2008
Location: SC
Boat: None,build the one shown of glass, had many from 6' to 48'.
Posts: 9,702
Re: Adding Used Motor Oil to Diesel Fuel?

Quote:
Originally Posted by CapnCrunch View Post
I have found casual mentions of the practice but can's seem to find a full thread on it. I gather that it not a recommended practice for newer engines but I haven't seen any negative comments about doing it with older diesels.

I also gather (again only casual mentions) that the used oil should be kept to around 1% of the fuel volume.

Does it cause operation problems?

Does it adversely affect fuel economy?

Is it illegal anywhere?

I would rather have posted this to the Trawler Forum because Trawlers tend to have larger tankage, but I cannot get their system to log me in so I thought I'd go ahead and ask y'all.
Why on earth would anyone want to add something removed for particulates and run it through a fuel system?
Cadence is offline   Reply With Quote
Old 30-11-2019, 12:25   #22
Registered User
 
Sailshabby's Avatar

Join Date: Jan 2011
Location: Deltaville, VA
Boat: Baba 40
Posts: 385
Re: Adding Used Motor Oil to Diesel Fuel?

Quote:
Originally Posted by moctrams View Post
Old diesel mechanic told me because of the low Sulphur diesel fuel these days I should add Marvel Mystery Oil to my fuel. I do it every time I refuel.
Worth a thread of its own, perhaps. Anyone using Marvel these days?
Sailshabby is offline   Reply With Quote
Old 30-11-2019, 12:29   #23
Registered User
 
Simi 60's Avatar

Join Date: Jun 2016
Location: Australia
Boat: Milkraft 60 ex trawler
Posts: 3,450
Re: Adding Used Motor Oil to Diesel Fuel?

Quote:
Originally Posted by a64pilot View Post
the dirtier fuel caused more maintenance in the form of increased fuel nozzle cleanings and cost money, not saved it.
Oil in fuel is the same thing, sounds like a good idea, but itís not.
Its what I suspected which is why I haven't gone down that path but it still doesn't help me get rid of used oil.

Hoping there is a waste oil container where we next come out of the water.
Simi 60 is offline   Reply With Quote
Old 30-11-2019, 12:35   #24
Writing Full-Time Since 2014
 
thinwater's Avatar

Join Date: Nov 2008
Location: Deale, MD
Boat: PDQ Altair, 32/34
Posts: 8,042
Re: Adding Used Motor Oil to Diesel Fuel?

Quote:
Originally Posted by Lepke View Post
I burned used oil after good filtering for about 50 years. I mixed about 10:1. If you think about it, a diesel will run on straight oil.

I centrifuge and test my oil now, so no longer burn because I have no waste oil. But in the past have burned waste oil in ship engines, tugs, and small engines, like Detroits. Because I've used bypass oil filters or centrifuges since the 1960s, my oil is cleaner than most. My engines went longer between overhauls than other operators, so I never saw a downside to burning oil. Burning waste oil is a common practice in larger commercial boats and ships. No idea what the EPA thinks of burning waste oil, nor do I care.

The EPA never did ban used oil for this purpose. They didn't need to. Truck line experience killed it, after which engine manufacturers, API, and ISO put the nail in the coffin. But it was primarily the truck lines and ships that that gave up on the idea.


On the face of it, it makes no sense to add dirt to a highly refined product. You can do it, with filtration, but it will only be financially successful anecdotally, not statistically.
__________________
Gear Testing--Engineering--Sailing
https://sail-delmarva.blogspot.com/
thinwater is offline   Reply With Quote
Old 30-11-2019, 12:54   #25
Registered User
 
Boatyarddog's Avatar

Join Date: Nov 2014
Location: Olympia, Wa
Boat: 1979 Mariner Ketch 32-Hull 202
Posts: 1,263
Images: 2
Re: Adding Used Motor Oil to Diesel Fuel?

Quote:
Originally Posted by Sailshabby View Post
Worth a thread of its own, perhaps. Anyone using Marvel these days?
Sure, but this is a top end lubricant, 60% mineral oil, not motor oil. You cannot filter out Chemicals that will deteriorate your fuel and engine.
As well add residue from combustion
Some things were not meant to be burned as an end result.
We burn used motor oil in our business.
Don't like it.
SV Cloud Duster
Boatyarddog is offline   Reply With Quote
Old 30-11-2019, 13:31   #26
Moderator
 
a64pilot's Avatar

Cruisers Forum Supporter

Join Date: Oct 2013
Location: Jacksonville/ out cruising
Boat: Island Packet 38
Posts: 31,473
Adding Used Motor Oil to Diesel Fuel?

Quote:
Originally Posted by Sailshabby View Post
Worth a thread of its own, perhaps. Anyone using Marvel these days?


I use it for a lot of things, but I donít add it to my boats fuel, however Iíve seen R-1340 aircraft radials that would stick exhaust valves without it. I believe itís not much more than stoddard solvent and something to make it smell nice, and Iíd say itís pure snake oil, except I have seen it work on old aircraft engines.
It was first formulated I believe way back when by the manufacturer of the Marvel carburetor to keep it clean, and when I say way back when Iím talking pre WWII I think.

Itís a great air tool oil. Isnít real oily and smells nice too, and does clean out the mess air tools accumulate from oily wet air
a64pilot is offline   Reply With Quote
Old 30-11-2019, 13:33   #27
Senior Cruiser
 
GordMay's Avatar

Cruisers Forum Supporter

Join Date: Mar 2003
Location: Thunder Bay, Ontario - 48-29N x 89-20W
Boat: (Cruiser Living On Dirt)
Posts: 42,550
Images: 241
Re: Adding Used Motor Oil to Diesel Fuel?

Quote:
Originally Posted by a64pilot View Post
The wear metals are of course fine enough to not be caught by an oil filter or they wouldn’t be in the oil to start with, but as any oil lab will testify, they are there ...
Quote:
Originally Posted by thinwater View Post
The EPA never did ban used oil for this purpose. They didn't need to. Truck line experience killed it, after which engine manufacturers, API, and ISO put the nail in the coffin. But it was primarily the truck lines and ships that that gave up on the idea.
On the face of it, it makes no sense to add dirt to a highly refined product. You can do it, with filtration, but it will only be financially successful anecdotally, not statistically.
Well said, both.
__________________
Gord May
"If you didn't have the time or money to do it right in the first place, when will you get the time/$ to fix it?"



GordMay is online now   Reply With Quote
Old 30-11-2019, 16:04   #28
Registered User

Join Date: Oct 2011
Location: St Petersburg, FL
Boat: Kanter Yachts Steel Spray 38
Posts: 62
Re: Adding Used Motor Oil to Diesel Fuel?

Quote:
Originally Posted by Sailshabby View Post
Worth a thread of its own, perhaps. Anyone using Marvel these days?
FWIW (and off topic), one comment on Marvel Mystery Oil. I was trying to figure out whether my rings were leaking oil, or if it was the valve stem seals by taking a compression test on the cylinders (6 cylinder gas engine), then putting oil in the cylinder and checking compression again to see if the oil sealed the cylinders and gave me better compression (hence, bad rings...). I didn't have any 30W oil, but the Marvel was close by, so I tried it. It EXPLODED! Shot the rubber tipped compression gage right out of my hand, and scared the crap out of me! I don't know if this is an anomaly, but I would guess that when, even at the low compression ratio of a gas engine, the Marvel oil explodes when compressed...
TKDSailor is offline   Reply With Quote
Old 30-11-2019, 16:57   #29
Registered User

Join Date: Jan 2017
Location: Sea of Cortez
Boat: Kelley-Peterson 46 cutter
Posts: 830
Re: Adding Used Motor Oil to Diesel Fuel?

Most engines will burn the old oil. If it's only 2%, there should be no problem burning the mix.
But why mix dirty oil into your clean diesel? Would you mix dirty diesel in with clean diesel just to save a couple euros or dollars?
I save my used lube oil to donate for recycling. If I ever install another diesel stove, I might filter the waste oil and mix it with stove diesel. But even after filtering, I would not pour it into my clean diesel tanks.
KP44 is offline   Reply With Quote
Old 30-11-2019, 17:51   #30
Registered User

Join Date: Dec 2014
Location: New Franklin, Ohio
Boat: Homebuilt schooner 64 ft. Sold.
Posts: 1,366
Re: Adding Used Motor Oil to Diesel Fuel?

Quote:
Originally Posted by TKDSailor View Post
FWIW (and off topic), one comment on Marvel Mystery Oil. I was trying to figure out whether my rings were leaking oil, or if it was the valve stem seals by taking a compression test on the cylinders (6 cylinder gas engine), then putting oil in the cylinder and checking compression again to see if the oil sealed the cylinders and gave me better compression (hence, bad rings...). I didn't have any 30W oil, but the Marvel was close by, so I tried it. It EXPLODED! Shot the rubber tipped compression gage right out of my hand, and scared the crap out of me! I don't know if this is an anomaly, but I would guess that when, even at the low compression ratio of a gas engine, the Marvel oil explodes when compressed...
My guess it was more of a hydraulic episode rather than an ignition one.
captlloyd is offline   Reply With Quote
Reply

Tags
diesel, fuel, motor, 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
Adding oil to diesel fuel? O_salt Engines and Propulsion Systems 56 07-04-2019 23:32
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

Advertise Here


All times are GMT -7. The time now is 01:58.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2021, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2021, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.