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Fuel Dilution of Engine oil

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39K views 262 replies 23 participants last post by  Top  
#1 ·
I have a little issue with fuel diluting the engine oil. For the last three oil analyses the fuel dilution % is rising steadily.
10,000 miles-4%
10,000 miles-9%
5,500 miles 6% Oil Analyzers had initially estimated the dilution to be <2% but at the suggestion of @OhioTech I asked that they run the actual test and it was actually 6%. They recommended I change the oil and filter, so I did that yesterday. They also said to "find the source of fuel leak".
I tow a trailer some. I don't idle the truck excessively. I only drive the truck if the trip will be 20 miles or more. I buy diesel from Walmart/Murphy mostly. I have the AEM @GDE compliant tune. I average about 23 MPG in normal driving and 14 MPG towing. The regerations of the DPF are about 250-275 miles in general.

My plan is to-
1-Buy better diesel when I can (Exxon/Mobil Synergy)
2-Run Amsoil, Opti-Lube, Hot Shot's Diesel injector cleaner at full strength for the next 4,000 miles and send in another oil sample for testing.

Since the AEM extended warranty covers the injectors, what criteria would the dealer use to replace them? Just my oil samples? Oil analysis isn't required so if I didn't do that and changed my oil every 8,000 miles due to biodiesel I still could be harming my engine unknowingly.

I don't think I've seen anyone else that has had this problem on the Oil Analysis thread.

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#92 ·
So my Oil analysis test shows increasing levels of Diesel in my oil. I made the appointment for the dealer to try and find the cause. I have no issues starting...just an occasional puff of blue smoke when I start it. Also doesn't feel down on power. Test results show higher than average levels of aluminum and iron in the oil alongside the diesel dilution. I did have a lot of extra oil that I had to extract just to get it back into the safe zone on my dipstick. 2016 Ecodiesel with +96k miles on it.
 
#93 ·
First, thanks for posting. This is good information to have. Second, I think there are more fuel diluted EcoDiesels running around than what people know. And lastly, how many miles were on your oil change interval?
 
#95 ·
ALSO, I ran diesel extreme around 4k miles ago. I also run 4oz of FPPF total power and 4oz of FPPF fuel power in every tankful since 2016. Still running the defective High pressure fuel pump as there are no replacement pumps available until sometime next year. Everything else mechanical on the truck is stock except for the Pioneer head unit.
 
#98 ·
That's a bummer @Deanmachine
-I'm going to give the dealership a try, but I don't expect much help, if any. If I can't get any movement there, I'm going to remove the injectors and send to S&S Diesel for testing and replace whichever bad injectors there are. Testing is $60/injector plus shipping so that's about $400 for all six. New injectors are about $640 each, then there is all the other lines, gaskets, o-rings etc., so I think I could possibly get everything back to good order for around $1,600 if only one injector needs replacement.
 
#107 ·
I'm going to remove the injectors and send to S&S Diesel for testing and replace whichever bad injectors there are.
Keep us updated. I would like to know what the testing results produce.
 
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#103 ·
Extended Warranty. The third objective is achieved through an Extended Warranty offered for all Subject
Vehicles that receive the Approved Emissions Modification. The Extended Warranty covers all parts and
systems affected by the Approved Emissions Modification, and the warranty term is the greater of (i) 10
years from the date of initial sale or 120,000 actual miles on the vehicle odometer, whichever comes first;
and (ii) 4 years or 48,000 miles from the date and mileage of installing the Approved Emissions
Modification on the vehicle, whichever comes first. Fiat Chrysler shall not impose on consumers any fees
or charges (and must pay any fees or charges imposed on consumers by any Dealer in accordance with
the applicable franchise agreements with such Dealers) related to the warranty service. The estimated
per-vehicle cost to Fiat Chrysler of the warranty components of this Class Action Agreement is
approximately $1,050.
Subject to the limitations on non-operable vehicles and vehicles that have modified emissions
systems, as discussed in Questions 14 and 15 below, all current owners and current lessees of
Subject Vehicles will be able to obtain the AEM and Extended Warranty regardless of whether they
are Class Members, but only Class Members are eligible for monetary compensation.

Hope this helps!
 
#105 ·
So Dennis from Ram Corporate called me tonight. He's still trying to help with the fuel dilution issue but it seems like it's up to me to find a dealer who will take truck in to look into the cause. I'm doing another oil change this weekend and sending the sample out to the Amsoil Oil analyzer people rather than blackstone. Talked to the Oil Analyzer team today and they were super helpful with setting up the online account. Theres a massive amount of data on their website in regards to testing. It's about the same price as Blackstone too.
 
#111 ·
I sure hope they find metal when they do my recall. I would love new injectors. But since I've always run good fuel with lubrication, I probably won't be that fortunate.
 
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#112 ·
Well, I have an appointment with the local dealer this morning. Hopefully I get some help.
When I made the appointment, the service writer was at least aware there is a recall on the HPFP. He said there are no parts available, of course, but seemed to be aware of what was going on with EcoDs.
Thanks to you all for your suggestions on this issue. I'm sure it is probably way more prevalent than we think.

I'll let you know how it goes.
 
#114 ·
I knew it would be like this at the dealer, but DAMN!
Yesterday I took my truck in at my 8am appointment time. The service writer I made the appointment with wasn’t there so another person assisted me. I told them the whole story, gave them a copy of the used oil analysis of the last five samples showing fuel dilution and I told them I think it is the HPFP spitting chunks into the fuel system and ruining injectors. I gave them the keys and got a ride home. At 4pm I called to ask for an update. I was told the truck was reassigned to a diesel mechanic and he was really busy but would look at it tomorrow morning.
Well now it tomorrow morning and I get a text to “call because the tech has some questions”
I called and the tech wanted to know “why do you think the oil is contaminated with fuel?”
 
#115 ·
I knew it would be like this at the dealer, but DAMN!
Well now it tomorrow morning and I get a text to “call because the tech has some questions”
I called and the tech wanted to know “why do you think the oil is contaminated with fuel?”
yeap, typical. No communications within the service department: OR in the past, the tech has recieved wrong info by the service manager and he just wants to make sure and "hear it from the horses mouth".
 
#122 ·
But as a tech (not with fca) I often talk directly to the customer and somewhat ignore the write up.
This has been my experience. My service advisors have me talk directly with the diesel tech, which I have gotten to know pretty well. My dealer experience with the EcoDiesel has been positive since day one.
 
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#121 ·
Well-
Just got a call that they can't find anything wrong with the truck and I can come pick it up. I asked what the tech had checked specifically and they said they would find out and let me know details when I pick it up.
🤷‍♂️
 
#123 ·
Just got a call that they can't find anything wrong with the truck and I can come pick it up. I asked what the tech had checked specifically and they said they would find out and let me know details when I pick it up.
That doesn't surprise me. Unless your truck is throwing codes, the dealer will most likely not find a reason to investigate. In other words, your truck runs fine, drives fine, and no codes are present.

That's why I recommend that you install new injectors and be done with it OR wait until the recall, then see if the tech finds metal debris, in which you will get new injectors under the recall.
 
#131 ·
Ol’ Mustang shawn video
I know he wasn't always popular with everyone, but I appreciated his videos, comments, thoughts, and theories about the EcoDiesel. He is greatly missed. :cry:
 
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