Obviously something needs attention.
2015 F-250 PSD Valvoline blue synthetic 5W40 - high fuel percentage
- Thread starter Donald
- Start date
- Joined
- May 8, 2023
- Messages
- 65
maybe it just regened more this time? more idle/city driving?
According to the one Lake Speed JR video us Diesel owners really need fuel injector cleaner. I also point out the fact we don't have much options for "Top Tier" diesel fuel either unless you have a Costco membership. What is thought is possibly deposit's on Injector tips. Regens mentioned above, short tripped, etc. Just watch some YT videos of some Fuel Injector Cleaner & see what's available then run it every tank. I need to do the same but right now mine is in low use mode w/diesel rated fuel stabilizer.
Driving is roughly the same. Not any big city stop & go. Rural roads and some in small town driving.
I almost always use Mobil diesel which supposedly has their advanced diesel additives.
I have started to use Archoil diesel treatment.
I almost always use Mobil diesel which supposedly has their advanced diesel additives.
I have started to use Archoil diesel treatment.
Archoils a start just try continued use w/fuel cleaner in the tank also. Hope it get's better for you after some time.
I was using Stanadyne in the gray bottle every other tank and then switched to Archoil in every tank.
But I always use Mobil diesel which I am told has Mobil branded additives, so better than plain diesel.
How many PSD have the same problem I have but don't do a UOA so they don't know?
Many of them dilute the fuel . Mine is always high.
As high as this UOA at over 8%? I typically go two clicks of the OLM before an oil change, this time I was mistaken and thought this click of the OLM was the second but it was only the first.
I know some gasoline and water in the oil is "burned off" when the engine reaches normal operating temp but I assume that does not happen with diesel fuel.
Here is a screen shot of the injectors. They look consistent so maybe not an injector problem?
So what % of fuel dilution would be cause to change the oil?
Amsoil says over 3.4% for diesel engines is not acceptable.
I think this is the correct screen for injector balance. With the first value being .36.
So here is the injector power balance test from Auto Enginuity. Engine was warmed up. Since the oil change I have run 2/3 of a container of Archoil diesel injector cleaner in 25 gallons fuel. And went through the tank of fuel on a trip to CT. The injector power balance test looks near perfect. Note the Auto Enginuity test does not disable the ECM's attempts to compensate for a bad injector. Only the Ford IDS does I believe.
So the question is if it's not an injector then what is causing the fuel dilution?
So the question is if it's not an injector then what is causing the fuel dilution?
- Joined
- Jun 10, 2024
- Messages
- 302
It may be the DPF regeneration strategy. They DUMP fuel past the rings on the exhaust stroke. My F450 would rise 2 quarts ever an oil change. It is not good for the rings as diesel fuel has very little lubricity.
Add a bottle of RL 85 Plus the first tank, then 1/3 bottle after that. See what happens. I think you will be pleased.
I use it for CP4 lube and water handling. It lessens the smoke on the old mechanical stuff as well.
Add a bottle of RL 85 Plus the first tank, then 1/3 bottle after that. See what happens. I think you will be pleased.
I use it for CP4 lube and water handling. It lessens the smoke on the old mechanical stuff as well.
Last edited:
OK. But what explains an increase in fuel dilution as I put more miles on the truck? Most of my oil changes have 16K on the oil with less fuel dilution than this time at 8K. I would not think regens would cause the fuel dilution to get worse over time. While higher mileage would mean more wear for the rings, I would not think the increased wear would allow more of the extra fuel during a regen to slip past the rings to the oil sump.
Still thinking it's injector related.
- Joined
- Jun 10, 2024
- Messages
- 302
Everytime it regens you have fuel wash passed the rings. It you have a regen every 500 miles over the course of 8,000 miles, you have 16 regens. If you change the oil every 5,000 miles, you only have 10 regens over that oil change interval. That means less fuel in the sump. Can you track your regens? You might be having one ever 200 miles now, vs 500 miles as before. I'd start by tracking regens.
You should try a quality injector cleaner first. If that doesn't work. Maybe the DPF is needing an oven bake. If you are experiencing more frequent regens with the same commute, that is likely.
Throw a bottle of Redline 85 Plus or Optilube in. After that get back to us.
You should try a quality injector cleaner first. If that doesn't work. Maybe the DPF is needing an oven bake. If you are experiencing more frequent regens with the same commute, that is likely.
Throw a bottle of Redline 85 Plus or Optilube in. After that get back to us.
Last edited:
I am not sure how to track a REGEN. Once and awhile I see a REGEN msg but it only lasts 5, maybe 10 seconds. I'd guess I miss most.
I ran 2/3 of a container of Archoil injector cleaner in 25 gallons of fuel. Drove from DE to CT and back.
- Joined
- Jun 10, 2024
- Messages
- 302
Maybe Mattd will chime in.
