Excessive Fuel in Engine Oil - 6.7 Engine

[PaulBarker]

Let me correct what i said.

I do not know if my oil in the engine is still taking in fuel. I have not change the oil since i stopped the regen process. After i change it i will be able to tell

 

[Jdonoghue]

The truck has no idea that it is at 7%. An algorithm is a mathematical formula that guesses when the fuel saturation reaches 4%. That is why you need to report to the dealer that if you sampled your oil when the oil change light came on and it was significantly different than 4%. Then they can report back to STAR so Cummins can make adjustments to the algorithm.

I'm a beta tester for this thing, eh? When was I hired as R&D? Where's my paycheck?

Just kidding. .

It saddens me that they have resorted to the Microsoft way of product development.

 

[courierdog]

I do know that since the AU reflash that the oil change interval has improved some what it is no where near the 7500 miles in the User Manual.
The amount of fuel dilution is significantly less, 0. 1 to max 1. 41% before and nil, (ZERO) since.
And yes it still goes into regen as it is supposed to.
While the milage is not where I want it it is now a consistent 17 MPG on the highway running at 60 MPH using Winter ULSD.
What more can I say it works. I can supply my oil sample results if anyone is interested.

 

[sag2]

diesel not a good lube, ULSD is no where close to as good as LSD. LSD is not a good Lube. Where are you getting your information. DID you stay at a Holiday Inn Express, Cause that doesn't work.

do you know for a fact that 7% fuel in the oil is a safe number. IF that is safe way havent't the dodge techs known about this when i asked them. Everyone told me i was crazy. There is not suppose to be fuel in the oil. They have no idea that during regen diesel will collect in the oil. Hell i guess it is so safe there is no need to tell any service department about it.

I never said diesel was a good lube, I said it was a good lube compared to other contaminates, i. e. coolant, dirt, acids, etc.

And I never said 7% was OK, I said the algorithm was based on 4% maximum. Someone else said they heard 7% was the number. I got my info from one of the STAR agents, and I think that is the most credible information out there.

There is not supposed to be fuel in the oil, but the fact is that when you inject fuel after the power stroke, unburned fuel is going to be getting past the rings. That is exactly the reason why there is an oil change reminder in the 6. 7 trucks. And exactly why some members see the light at early mileage, and others hardly see it at all, based on driving habits.

If the technician has attended the Diesel Fuel and OBD II Systems course they would know exactly how the system was designed to operate. Unfortunately not all technicians have attended it or the other diesel courses that Chrysler offers at its training centers.

 

[barbwire]

1. When you remove the DPF and CAT, and disconnect the sensors the ECM knows something is wrong and does not regen. BUT it will derate the engine after about 50-100 miles. I know this from experience.

2. My experience with most of the folks that buy these trucks, is that they don't need to be reminded to change their oil. Dishing out almost $60k for a new vehicle is reminder enough for me to keep an eye on it and protect my investment. I am much more inclined to think it is their way of covering there ***** for a leaky injector issue. I can hardly believe that they are not checking injectors to confirm that this isn't the problem, Just automaticly assume it is from the REGEN events.

3. If as you say, fuel dilution in the oil is not a problem if I follow the manuf recommendations, than which recommendation should I follow. They say it is recommended at 7500 miles but then they have the computer tell you 3000 miles. And if it is not problem,,, then why did GM double their manufacturer warranty on the engine when they had this issue with leaky injectors back in 02 and 03. Are there engineers not as smart as Dodges. Sorry but I don't believe it.

4. Emissions have been reduced. But for the sake of a little soot, that will fall to the ground like dust, We have reduced our fuel economy by 7mpg. Now where is the sense in that. How can getting 30% less fuel economy be good for the enviroment?????? Hhhhuuuuummmmm?????

P. S. If you are so concerned about the enviroment, go buy a prius. They run off of gas and electric, which as you know, here is Calif we produce electricity by burning Natural GAS. Another natural resource that we could be saviing for heating homes etc.

There is always a trade off, and quite frankly I am getting sick of paying the price for all the enviro wackos in this state. You want to clean up the planet, go overseas where they send all the cars that won't come close to passing our laws. RANT OVER!!!!

I think you nailed it on all accounts. And I couldn't have said it any better. I think Paul was on your side as well. At least thats what I read into it. Just my $. 02