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JerryM
Dodge Dakota
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2/26/2005
14:11:32
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 Subject: Oil Sludge ?
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Hello,
I know this has been talked about before, would appreciate anyone's experiences or suggestions with this problem.
My 2000 4.7 liter now has that tan looking oil sludge in the oil filler neck. I recently changed to full synthetic oil, not sure if that is causing the problem. I also just bought another vehicle and am not driving my truck as much either.
Any idea if this film can be a potential problem for the engine?
Thanks
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jb
Dodge Dakota
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2/26/2005
14:36:16
| RE: Oil Sludge ?
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I read on this sight that the sludge in the oil filler neck would go away if you used synthetic oil. I still have that look in my truck and have used mobil 1 the last 3 oil changes. It is just condesation from where the filler tube is in front of the fan. Already talked to a dealer and they said it was normal and would not harm the engine. If you change your own oil just keep your receipts for the filter and oil
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Anthony
Dodge Dakota
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2/26/2005
16:53:49
| RE: Oil Sludge ?
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Using synthetic wont change anything. I've been using M1 for over 3yrs now and I still have this problem on my 2000 4.7. What happens the oil is hot in the motor and that filler tube stays cold because it's plastic thus making condensation which collects at the top of the cap and filler tube.
The only way to get rid of this mustard crap is to insulate the filler tube.
Anthony
www.geocities.com/dak2nv/
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AmsoilSponsor
DakotaEnthusiast
 
2/26/2005
18:04:36
| #1 Amsoil Dealer Steven Roark Amzoil Ams Oil #1
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Jerry,
WHAT CAUSES SLUDGE --- IN GENERAL
Blowby gases and shear stresses in bearings are creating sludge "molecules" all the time. These molecules forms a brown to black tacky substance that will adhere to engine parts and oil return passageways unless there is sufficient "solvency" to break them up. Solvency is created with the addition of Magnesium and Calcium dispersant-detergent packages --- a.k.a. part of the additives package in an oil.
As part of the additives package ---Solvents "depolymerize" the sludge, and attempt to break up sludge molecules, and then float them to the filter via the normal oil stream.
If you are experiencing sludge problems --- consider switching to a synthetic oil that offers a better dispersant / detergent additive package.
Not all synthetic oils are created equal. Yes, --- they may have similar base oils --- but it is the manufacturers specific blend of Base Oils --- and more specifically the quality of the additives package that makes all the difference.
Again, If you are experiencing sludge problems --- consider switching to a 100% True Premium Synthetic Oil that offers the best dispersant / detergent additive package.
You can perform a "forum search" here and learn more about sludge problems --- cause and effects.
__________________________________________________
There are three types of synthetic oils marketed today. Brief Descriptions:
(1) PRETEND (FAKE) SYNTHETICS -
Group III Base Oil (hydrocracked conventional petroleum crude dino). Castrol started this by taking dino though additional refining processes and the courts ruled that they could "use" the work synthetic.
(2) 100% TRUE Synthetic Oil -
Uniform molecules built in the laboratory. Typically blended with a combination of:
--- Group IV = ( PAO or Polyalphaolefin ) base oil.
--- Group V = an esther or polyolester base oil.
--- Each manufacturers unique Additives Package
(3) Synthetic Blends -
With commercially available synthetic blends, you have no idea of what the synthetic to dino oil ratio is. It is a marketing ploy to confuse the public. Blends allow for a lower quality/price base oil / additive package --- to be mixed with a small amount of synthetic, meet the specs, and get a premium price from you the consumer.
__________________________________________________
Most of the PRETEND (Fake) Synthetics use a Group III base oil ( hydrocracked conventional petroleum / dino ). A 100% TRUE Synthetic Oil uses either the Group IV or Group V base oil, or a mix of the two, plus their own unique additives package. As a matter of fact, I don't think any of the TRUE synthetics use all of one, they mix a combination of both. Group IV is PAOs (Polyalfaolefins) while Group V is the esters.
__________________________________________________
You can Request a FREE Amsoil Catalog by clicking below.
Steven Roark , Amsoil Dealer , Proud Sponsor of www.DodgeDakotas.com
AMSOIL Synthetic Motor Oils, Lubricants, Filtration, and Truck Care Products
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SteveC
Dodge Dakota
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2/28/2005
20:24:51
| RE: Oil Sludge ?
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...it's a good article, but Jerry has a slightly different sludge problem than what this article addresses...
If you stand in front of the truck and pop off the filler cap, look at the left (passenger) side of the funnel. You'll see a tap and a line running to the rear of the intake manifold. This is the PCV line on this engine.
All the crankcase vapors, including water vapor and a fine mist of oil, end up rising to this filler adapter to get sucked through the intake and burned. When those warm vapors get to this cold plastic "funnel", surrounded by cold ambient air, the water vapors, mixed with oil mist and combustion by-products, condense, leaving this stuff behind.
The problem seems to be most prevalent in cold, damp climates, and the colder and damper it is (and the more short trips one drives), the worse the goo appears in the oil filler.
It doesn't matter what oil you use, it's really just a design quirk of this engine. It should disappear in warmer, drier weather, or with some longer trips.
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Andrew
Dodge Dakota
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3/05/2005
03:53:34
| RE: Oil Sludge ?
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Yep, that is the problem. The pcv valve is a bad design on the engine, on the rebuilt engines, they use a different pcv valve design. Wonder why?
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JerryM
Dodge Dakota
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3/05/2005
09:46:06
| RE: Oil Sludge ?
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Thanks for the replies everybody.
Not sure what to do next. Maybe let it go or try insulating the filler tube and also installing some type of baffle to block the air flow from the fan.
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Pugs
Dodge Dakota
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3/06/2005
14:40:12
| RE: Oil Sludge ?
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Short trips has nothing to do with it. I used Mobil 1 and commute to work every day and still have a nice paste in the oil filler neck.
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JerryM
Dodge Dakota
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3/06/2005
19:36:12
| RE: Oil Sludge ?
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I guess in my original post "sludge" may not have been the best word to use. Foam, film, paste, milkshake all better describe it.
I know a lot of people are concerned about it. Not sure if it can present a potential problem for the engine or not.
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Big Ed
Dodge Dakota
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3/06/2005
21:18:52
| RE: Oil Sludge ?
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I have two daks, both 4.7 (2000 & 2002), the 00 gets driven about 4 miles twice a day. (lots of "sludge" build up in filler cap) the 02 goes on long trips, 10 miles or more , no "sludge". The warmer the engine, the less condensation build up. That simple.
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