I have been running power service fuel conditioner, and seem to notice a bump in fuel economy when I use it. Has any one else noticed such a event? Or am I dreaming?

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46 WDX Power Wagon

84 300TDT daily driver

Hey, well, you just may be getting better mileage. I've noticed that when I run an additive, the car runs and sounds smoother.
-Joe

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'81 MB 300SD, '82 MB 300D Turbo (sold/RIP), '04 Lincoln Town Car Ultimate

Sooner or later every car falls apart, ours does it later!
-German Narrator in a MB Promotion Film about the then brand new W123.

Yep, it also seems to run slightly better.

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1999 SL500
1969 280SE
2023 Ram 1500
2007 Tiara 3200

According to a table on the effects of fuel properties on engine performance in a published diesel engine manual (3rd edition), increasing the cetane number affects the engine in the following ways:

1. Starting Improves
2. Lubrication Improves (presumably injection components, not engine)
3. Smoke Decreases
4. Exhaust odor Decreases
5. Power output not affected
6. It says fuel consumption is related, presumably decreases as cetane increases, as per your results.
7. Increases combustion chamber deposits.

So, basically, it gives you a great deal of advantages but the tradeoff is more combustion chamber fouling.

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"I would rather be ashes than dust!
I would rather that my spark should burn out in a brillaint blaze
than it should be stifled by dryrot.
I would rather be a superb meteor,
every atom of me in magnificent glow,
than a sleepy and permanent planet.
The proper function of man is to live, not to exist.
I shall not waste my days in trying to prolong them.
I shall use my time."

-Jack London 1876-1916

1983 300CDT (running WVO since 12/05)
1981 300SD (parts car)

I have run both Power Service's 4 and 6, and RedLine diesel fuel additive and find RedLine to quiet and smooth my 603 better than Power Services.

I get 24.8 w/out and 28.6 w/ either type,it does however run much smoother w/ it.W/ some coaxing from a fellow 617 owner who I thought was fos I also added the marvel mystery oil to my engine last oil change for the first time and man what a difference in vibration and noise. works for me...

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I'mm SSOOOOOO CONFUSED!!!!
81 300 Sd
88 Jag XJS
96 f250
73 bronco
77 goldwing

You added it right to the engine oil? I've always been afraid to add anything to the oil because of how it could interact with the already present additives in the oil....I don't think I'll ever mix anything in the oil itself, but I have run lots of Mystery oil through the fuel and it did make quite a difference....now that I am on B20 though its smooth anyways so I don't really need it.

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-diesel is not just a fuel, its a way of life-
'15 GLK250 Bluetec 118k - mine - (OC-123,800)
'17 Metris(VITO!) - 37k - wifes (OC-41k)
'09 Sprinter 3500 Winnebago View - 62k (OC - 67k)
'13 ML350 Bluetec - 95k - dad's (OC-98k)
'01 SL500 - 103k(km) - dad's (OC-110,000km)
'16 E400 4matic Sedan - 148k - Brothers (OC-155k)

I have added 8 oz.Power Service with each fill up and can attest to the fact that I get better milage about 2 to the gallon. Engine runs soother and quieter as well. I buy the 96 oz. jug and keep it and an 8 oz. container in the trunk for each fill up.Use it all year round
Cheapest at Wal Mart.

Tried a lot of MMO and didn't see any difference

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01 Ford Excursion Powerstroke
99 E300 Turbodiesel
91 Vette with 383 motor
05 Polaris Sportsman 800 EFI
06 Polaris Sportsman 500 EFI
03 SeaDoo GTX SC Red
03 SeaDoo GTX SC Yellow
04 Tailgator 21 ft Toy Hauler
11 Harley Davidson 883 SuperLow

Tried Power Service once and now I cannot live without it. Have not yet tried Redline.

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1981 300SD 118K
2000 Toyata Tundra 64K

I'm going to give it a shot...but am not expecting much since I run B20.....

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Proud owner of ....
1971 280SE W108
1979 300SD W116
1983 300D W123
1975 Ironhead Sportster chopper
1987 GMC 3/4 ton 4X4 Diesel
1989 Honda Civic (Heavily modified)
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Section 609 MVAC Certified
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"He who fights with monsters might take care lest he thereby become a monster. And if you gaze for long into an abyss, the abyss gazes also into you." - Friedrich Nietzsche

Tried that too. Didn't see any real difference with or without.

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01 Ford Excursion Powerstroke
99 E300 Turbodiesel
91 Vette with 383 motor
05 Polaris Sportsman 800 EFI
06 Polaris Sportsman 500 EFI
03 SeaDoo GTX SC Red
03 SeaDoo GTX SC Yellow
04 Tailgator 21 ft Toy Hauler
11 Harley Davidson 883 SuperLow

Ok I guess that may be I am not nuts..

83Mercedes, How does a cetane improver increase combustion chamber deposits??

will go looking for some redline and see what that does for the ride..

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46 WDX Power Wagon

84 300TDT daily driver

JD, I'm not sure, that's what is says in the book. It's one of the better known publications on diesel engines in general, and it has a good-sized section on different fuel properties and their effects (including cetane number), and it says that combustion chamber deposits increase as cetane number increases. That is the only disadvantage, however.

The book is: Troubleshooting and Repairing Diesel Engines: 3rd Edition by Paul Dempsey.

__________________
"I would rather be ashes than dust!
I would rather that my spark should burn out in a brillaint blaze
than it should be stifled by dryrot.
I would rather be a superb meteor,
every atom of me in magnificent glow,
than a sleepy and permanent planet.
The proper function of man is to live, not to exist.
I shall not waste my days in trying to prolong them.
I shall use my time."

-Jack London 1876-1916

1983 300CDT (running WVO since 12/05)
1981 300SD (parts car)

When I had an 85 GMC Surburban with the 6.2L diesel, I always used fuel additive. It helped with starting, and milage (would average 20 mpg), not sure about idle, and other claims above. Have not tried it in the 87 Turbo Diesel, yet. Might try it.
Lee