diesel additive
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diesel additive - 2/12/2007 12:09:00 PM
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garylee24
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Joined: 2/1/2007
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Is there a specific diesel fuel additive for mercs? i was told there was such a thing and it gives extra lubrication to the fuel system, pump, etc. Is there such a thing?
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RE: diesel additive - 2/12/2007 1:28:27 PM
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Charles Munn
Posts: 244
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quote:
ORIGINAL: garylee24
Is there a specific diesel fuel additive for mercs? i was told there was such a thing and it gives extra lubrication to the fuel system, pump, etc. Is there such a thing?
Add a qt or even a gallon or two of soy salad oil. It has a high cetane value and you'll know it's working because the IP and engine will be quieter. Costco has soy salad oil in 4.3 gallon containers for about $17.00. BTW, I ran my VW on pure salad oil. It was still purring like a little tiger when I sold it at 167000 miles on the od...and I now run WVO in Bruno, my old MB 300D T.  and ol' Bruno purrs like a big Tiger...He now has over 321,000 on his od and I don't need to add oil between changes..
If that spooks you, then run about 10% or 20% biodiesel, which is veggie oil without the glycerin...
< Message edited by Charles Munn -- 2/12/2007 1:32:11 PM >
_____________________________
1982 300D T, 322,000miles
1991 Lexus LS400 212,000 miles
1986 GMC, HD, "J", 429,000 Km
All truth passes through three stages. First, it is ridiculed. Second, it is violently opposed. Third, it is accepted as being self-evident.
Arthur Schopenha
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RE: diesel additive - 2/14/2007 10:53:03 AM
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Drrty240D
Posts: 160
Joined: 7/30/2006
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I run Power Service supplement in winter -- you can get it at Wal-Mart. It has a cetane booster, a lubricating factor and an anti-gel agent which is helpful during the cold weather.
Be careful adding vegoil of any type when the weather is below 45 degrees as it will lower the cloud point of your diesel fuel and make starting your engine very difficult. It can also clog your filters, IP and injectors thereby crippling your engine.
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RE: diesel additive - 2/14/2007 11:36:13 PM
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ForcedInduction
Posts: 893
Joined: 5/20/2006
From: Federal Heights, Colorado
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I use an additive that only boosts the cetane number of the fuel. There is no need what so ever to worry about the lubricity of the fuel.
8+ CETANE IMPROVER
Fuel PowerIncrease Cetane - Increase Efficiency
Diesel engines function on the principle of Auto Ignition. The range of temperatures varies from 410ºF to over 1040ºF, this wide range is due to lower cetane numbers. 8 Plus Cetane Improver will raise the cetane level of your fuel providing faster starting, reduced engine noise, reduced smoke and particulates, and increased power and acceleration.
http://www.fppf.com/8cetaneimprover.asp
_____________________________
1980 240D 3.0VNT 222K Miles. OM617.95, GT2256V VNT turbo, 4-speed manual, 3.46 diff, 15mm rear swaybar, ALDA removed, no EGR and Amsoil by-pass oil filter. Currently 107HP and 195lb/ft of torque at the wheels.
www.youtube.com/Turbo617
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RE: diesel additive - 2/24/2007 3:07:19 PM
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Charles Munn
Posts: 244
Joined: 8/19/2006
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quote:
ORIGINAL: ForcedInduction
I use an additive that only boosts the cetane number of the fuel. There is no need what so ever to worry about the lubricity of the fuel.
8+ CETANE IMPROVER
Fuel PowerIncrease Cetane - Increase Efficiency
Diesel engines function on the principle of Auto Ignition. The range of temperatures varies from 410ºF to over 1040ºF, this wide range is due to lower cetane numbers. 8 Plus Cetane Improver will raise the cetane level of your fuel providing faster starting, reduced engine noise, reduced smoke and particulates, and increased power and acceleration.
http://www.fppf.com/8cetaneimprover.asp
You're most probably right, but there's no doubt that my old 300DT runs much quieter when using veg oil, which seems to indicate the ip and engine may like a bit of additional lube... Veg oil also does a good cleaning job.... ridding the fuel tank and lines of soot... It takes a few miles before the lines and tank are finally clean so, depending on how dirty it is, you'll also have to replace a few fuel filters. Of course bio diesel has the same effect, but, IMHO, is much more abrasive. But either or both are good additives, and also cut down on emissions as well as being carbon neutral.
During the summer I use 100% veg oil. In the winter I use 90% veg. ( I live on the Pacific North West, coldest so far this winter where I live was around 20 degrees F.) I installed mercedessource.com modules, using the original fuel tank as the only fuel source. Granted, it's still experimental, especially at sujch a high percentage of veg oil, but so far the system has performed flawlessly.
_____________________________
1982 300D T, 322,000miles
1991 Lexus LS400 212,000 miles
1986 GMC, HD, "J", 429,000 Km
All truth passes through three stages. First, it is ridiculed. Second, it is violently opposed. Third, it is accepted as being self-evident.
Arthur Schopenha
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RE: diesel additive - 2/24/2007 4:36:56 PM
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ForcedInduction
Posts: 893
Joined: 5/20/2006
From: Federal Heights, Colorado
Status: offline
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quote:
ORIGINAL: Charles Munn
During the summer I use 100% veg oil. In the winter I use 90% veg. ( I live on the Pacific North West, coldest so far this winter where I live was around 20 degrees F.) I installed mercedessource.com modules, using the original fuel tank as the only fuel source. Granted, it's still experimental, especially at sujch a high percentage of veg oil, but so far the system has performed flawlessly.
I STRONGLY suggest you use a two tank system and stop running the veg oil with a single tank "conversion". The cold oil going into the engine before it's warm will cause wear in the injection pump, coke the injectors and damage the piston rings as it builds up a gunk on everything.
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RE: diesel additive - 2/25/2007 1:26:16 PM
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Charles Munn
Posts: 244
Joined: 8/19/2006
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quote:
ORIGINAL: ForcedInduction
quote:
ORIGINAL: Charles Munn
During the summer I use 100% veg oil. In the winter I use 90% veg. ( I live on the Pacific North West, coldest so far this winter where I live was around 20 degrees F.) I installed mercedessource.com modules, using the original fuel tank as the only fuel source. Granted, it's still experimental, especially at sujch a high percentage of veg oil, but so far the system has performed flawlessly.
I STRONGLY suggest you use a two tank system and stop running the veg oil with a single tank "conversion". The cold oil going into the engine before it's warm will cause wear in the injection pump, coke the injectors and damage the piston rings as it builds up a gunk on everything.
All injectors present a coked ring. Regardless of the fuel burn, it's a normal occurance. The picture you've presented, where the ring is slopping over and is not a precise circle, indicates that the heat shield is failing.... and that has nothing to do with the type of fuel.
I also installed a 2 tank system in my creampuff 1990 Jetta ecodiesel, and drove it for over 35,000 miles, finally understanding that constantly heating and cooling veg oil is a major problem in itself, which eventually causes a green substance to form in the tank, etc..... and it's little more than a Rube Goldbery device..
Yet I do preheat the veg oil. It's first preheated veg oil in the sump chamber. I replaced the 5/16" fuel line coming from the tank, to a 1/2" fuel line which allows even near frozen veg oil to gravity flow into the heated fuel sump chamber, then into a clear filter, then into the electric fuel boost pump. then into another clear filter, then into a stanadyne water separator filter, then into another gp heater, then into the IP...
Still, with all of that...The veg oil only needs heating in order to get it to flow, and to extend the life of the water separator filter. Grantedf, the first few minutes before the engine reaches operating temp, the oil should be heated at the fuel injection lines...That can be done with in line heaters.
But after the engine is at operating temp, the natural heat, measureed with an infra temp gauge, at the outside of the IP is 120 degrees, and the natural temp of the injection fuel lines is just about 200 degrees. That means any fuel, including Veg oil, is instantly heated to 120 at the IP and to 200 degrees when it enters the fuel injection lines ...
So, IMHO, except to get and keep the fuel flowing, and to extend the life of the water separator filter, the need to preheat veg oil, other than the first few minutes until the engine heats up ( which is easity done by in line heaters ) ... Preheating veg oil after the engine is warm is a myth, probably created by those who sell heated 2 tank systems, and unnecessary unless there is a fear that it gets so cold that the veg oil solidifies.
That problelm can easily be addressed by adding a small 5 gallon marine tank in the trunk filled with diesel...plus. a soliniod to switch from veg oil to diesel ... and in my case, simply flip on the return fuel switch on my dash... which will send heated fuel to the tank and quickly liquidize it.
But even with that system, the purging is unnecessary provided one has in fuel line injection heaters... which can be bought from mobetta at schumanautomotives.com for $25.00.
< Message edited by Charles Munn -- 2/25/2007 1:27:53 PM >
_____________________________
1982 300D T, 322,000miles
1991 Lexus LS400 212,000 miles
1986 GMC, HD, "J", 429,000 Km
All truth passes through three stages. First, it is ridiculed. Second, it is violently opposed. Third, it is accepted as being self-evident.
Arthur Schopenha
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RE: diesel additive - 2/25/2007 2:08:20 PM
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ForcedInduction
Posts: 893
Joined: 5/20/2006
From: Federal Heights, Colorado
Status: offline
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Whatever, it's your engine.
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