Why did my 99 diesel(237k) oil remain clean for a long time, but this new 06(47k) i have it goes coal black right after i change it. Whats up with that.

 

Normal for the 04.5's and up. I understand that it is caused by the 3 injection events.

 

Same thing with mine. My dad has an 03 and his stays super clean. I can change mine and check it after its idled a few mins and its black again.

 

Agreed.. My 4.5 does the same thing.. I even ran a bypass filter for awhile to try and keep it clean. Still was black as coal.

Changed CAM to help spool and hoped it would also clean oil by changing in cylinder EGR
Nope.. oil still black.

 

so what causes this condition? can it be fixed??

 

As was mentioned by others, it is normal for the 2004.5+ engines and it is caused by the 3rd injection event.
I really hate that it does this and it was thought that the OEM stock camshaft was responsible for this but installing an aftermarket cam won't fix this issue.

With Smarty UDC and EFI Live both having the ability to turn off the 3rd injection event, we'll see how that plays out and how it affects the engine oil.

It is what it is. While the black oil looks like hell, it doesn't affect engine longevity at all.

 

if you fix it you also get 6 mpg increase, cleaner oil lower egt and longer life. read the following paste
Your truck uses in- cylinder egr for smog reduction. They also extend fueling duration and retard the timing to keep peak heat and pressure down. Since the third injection pulse is so late in the cycle the egt is very hot compared to a 03 but the peak temp where the no is formed is actually lower. i will try to keep it simple, the cam exhaust lobe is ground to leave burnt exhaust gas in for the next cycle. Change the cam to a pdr or colt. the hamilton is ground more for kids who are after power, we just want low end torque and mpg. Change or hone the nozzles to ddp 50 hp. get a smarty jr leave the torque set on default, timing set to 3 and on economy or sw1 as it is called. get a fbd turbo back straight pipe kit 5". get a m090072 resonator and a m090535 muffler and 4 clamps from ryder truck parts. for the first one i did it took me 5 hours. after about the 10th one i can do it in about 3 hours. it takes longer to remove the old one than you think. i install them by myself and you do not need any special tools. i have my own shop and change the cams and nozzles here. you will probably have to pay labor. Do the nozzle change at the same time as cam to save labor. Use the left over pipe to extend the exhaust out further to keep the fenders cleaner. from ah64id There is no external EGR on any 5.9. The 04.5-07 meet the 04 emissions by utilizing "in-cylinder" EGR. The 4 big ways this was done was cam, pistons, timing, and turbo.

The cam lobes are timed so that the intake is a longer duration, and the exhaust is very short (shorter than any other Cummins in a Dodge) and the exhaust closes sooner to keep more gasses in the cylinder, this decreases combustion temp.

The pistons are a non-reentrant design and don't promote as good of air movement and combustion, again reducing peak combustion temps (and makes the pistons really easy to melt)

The timing is retarded to again reduce peak cylinder pressure and combustion temps, and to raise the EGT's to help the Cat work.

The Turbo has a very inefficient turbine wheel and small housing, this provides backpressure on the manifold to again reduce the exhaust scavenging effect.

The 03-04 actually has the same cam, and the turbine is even smaller, but its the combo of the timing and the piston in the 04.5-07's that completes the effect.

Personally I have changed my cam, use the Smarty Jr for timing, and will be swapping turbo's this spring. Should help clean up my oil, combustion, and power... thou it will increase the NOx effects.
flat lander it gets very confusing on the 04.5 up with the in-cylinder egr. they delayed timing, lengthened duration and added a very late 3rd pulse this was done to keep peak pressure and peak cylinder temp down but because the fuelling is so far away from tdc the egt's appear way hotter than previous models but in actuality it is lower than previous models on the pistons. for us that want better mpg we reverse engineer the process and as we do we see the egt drop knowing we are bringing piston temp up. with the smarty jr on default tow you will have both lower egt and piston temp than earlier models. you desperately need to change your cam to a pdr or colt and get you some 50 hp nozzles from ddp. this will gain you 6 mpg and the lowest egt once the nozzles are on you need to go back to the economy setting. the 50 hp from the nozzles is kind of a unwanted byproduct of shortening the fuelling duration. With 40 hp from the jr and 50 from the nozzles it fits the air you have and is better than stock on the engine. some posting on here like to play and their requirements are different 150 hp nozzles drastically shortens duration to where the main or 2ond pulse injects the fuel just over tdc where the pressure is highest and the most efficient work is done but also produces the most piston temp. Because the fuel burns longer the egt appears lower. we tow very heavy and have many drivers. We cannot have a truck set up that you have to drive by a pyrometer. some of our older trucks have at or over 1,000,000 miles on them all of our 06's are set up this way except the one in my sig i added enough air to use tow setting. bigwheels 94 gave a good explanation on the stick timing vs size. with the new 514 smarty software the timing for 50 hp nozzles need to be set on #3. The stock turbo will work but it needs to be modified. To keep this short pm me if you want to mod the turbo. If new turbo a 62-65-12 is the size

 

The Smartly has had the third injection off for a long time now. Marco explained this in a post. I will find it later because searching from my phone takes too long!

 

to me its a sign of the oil doing its job, i have used some oil that just stays clean and others that just turn black instantly and some that turn black when working the engine hard.....