Sea Foam
Posting Guru
Joined: Jul 2007
Posts: 1,433
Likes: 2
From: Spring Lake
My roomate is a huge diesel guy... 04 cummins and a 95 powerstroke. He has never put it in his cummins but adds a pint of it to his oil in the 7.3 and uses it as a top engine cleaner and swears by it. He dont put it in the fuel tho b/c he's got some other additive that is more cost effective
Cargo Master
Joined: Dec 2007
Posts: 2,196
Likes: 120
From: Carstairs Alberta
you certainly can not pour it in the intake like on a gasser, very bad for engine. the reason it works on gas engines is that the fuel is sprayed on the back of intake valves and it helps soften carbon depoisits so they flake off. on diesels the only thing in the intake is air so valves don't really carbon up anyways, the fuel injects directly into the cylinder. no pour into gas tank additive will do anything for exaust valve buildup, because its already burnt by the time it get to the exaust. as far as the exaust buildup on a diesel if you just work it hard enough it will burn itself clean kind of like a controlled burn in a chimney fire
Senior User
Joined: Dec 2008
Posts: 192
Likes: 0
From: Canada
I was watching some official sea foam videos they said its allowed on diesel applications
http://video.google.com/videoplay?do...90865726229173
go to about 4:00 min they talk about it then
http://video.google.com/videoplay?do...90865726229173
go to about 4:00 min they talk about it then
Senior User
Joined: Apr 2005
Posts: 122
Likes: 2
From: Spokane, WA
About every third fuel filter change I fill the bowl up with it to do a great job of cleaning up the injectors.
Haven't had a problem yet.
Haven't had a problem yet.
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Posting Guru
Joined: Jul 2007
Posts: 1,433
Likes: 2
From: Spring Lake
you certainly can not pour it in the intake like on a gasser, very bad for engine. the reason it works on gas engines is that the fuel is sprayed on the back of intake valves and it helps soften carbon depoisits so they flake off. on diesels the only thing in the intake is air so valves don't really carbon up anyways, the fuel injects directly into the cylinder. no pour into gas tank additive will do anything for exaust valve buildup, because its already burnt by the time it get to the exaust. as far as the exaust buildup on a diesel if you just work it hard enough it will burn itself clean kind of like a controlled burn in a chimney fire
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Elder User
Joined: Aug 2007
Posts: 503
Likes: 0
From: arizona
I wouldn't do it. Seafoam says it can go in the motor, but it will thin out the oil. I'd only do it before an oil change maybe.
The only motor cleaner I use is Auto RX, it takes time, but works better than anything i've tried.
Auto-Rx Engine Cleaner
The only motor cleaner I use is Auto RX, it takes time, but works better than anything i've tried.
Auto-Rx Engine Cleaner
Cargo Master
Joined: Dec 2007
Posts: 2,196
Likes: 120
From: Carstairs Alberta
as said by others the problem with adding stuff to the oil on the 6.0 is the fact that about 3 quarts of oil stay in the hpop and don't get changed. if you are ok with that, cool. alot of people are not so cool tho
Hotshot
Joined: Mar 2007
Posts: 10,101
Likes: 40
From: Pa
I don't have faith in seafoam. I've tried it in the headstock of one of my lathes to see if it would clean off the crud film on the inside. I added a full can of seafoam to 4.5 quarts of 20w-50 ran it for 5 hours and took the cover off. Seafoam did nothing. Apples to Oranges comparision but.... I have a problem putting a solvent in my engine oil especially a harsh solvent like seafoam. I add fuel injector cleaner once every year and don't baby the truck, no problems.