Used to enjoy driving my 81 300SD with just plain diesel. Decided to try diesel Power Service cetane boost (gray bottle). Car was more responsive and less to no smoke if I floored it but I did not think the difference was that much. Well, the big gray bottle ran out and I decided not to replace it. Bad move, the car is definitely grouchy and slow. Works a lot harder to get up to speed. Sounds like I will be using PS for the rest of my diesel life. Anyone else experienced such a big difference in performance?

__________________
1981 300SD 118K
2000 Toyata Tundra 64K

I would change the fuel filters and maybe do a Diesel Purge and see if it's any better.
-Joe

__________________
'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.

You have discovered that most of the diesel sold is about 40 cetane. The equivalent of cat pee. You can occasionally find 42 or 45 cetane, "premium diesel" and you likely will pay more. I think the minimum cetane MB recommended was 45. Sure, they will run the cat pee but not near as well as on good fuel. The Power Service makes up the difference. I have found that some stations have better fuel than others even though the pumps are not marked any different. You can try different stations, premium diesel or just keep using PS. There are other good additives out there too. Stanadyne Performance Formula, Howes Lubricator Diesel Kleen, Redline Diesel Catalyst, Amsoil, etc. I can prove a 1/2mpg to 1mpg increase on my work truck using an additive so I feel it is worth my effort and money. RT

__________________
When all else fails, vote from the rooftops!
84' Mercedes Benz 300D Anthracite/black, 171K
03' Volkswagen Jetta TDI blue/black, 93K
93' Chevrolet C2500HD ExCab 6.5TD, Two-tone blue, 252K

I use Power Service in every tank on the 603. 12 oz. to 20 gallons. Gives a 6 point cetane increase.

I definitely notice the difference with it as compared to the regular "cat pee".

I use it liberally, I also ended up w/ a free case of ATF, so I've been runnin that too. 2 people so far have commented to me, 'your diesel doesn't smoke much'

__________________
Cheers,
Robert

There's the change the fuel filters miracle cure again. What a load of BS.

P E H

I have used ps in almost every tank since I got my car. It seems to like it and the one time I tried atf I could feel it draging.

__________________
2016 Corvette Stingray 2LT
1969 280SE
2023 Ram 1500
2007 Tiara 3200

I've used the Power Service and currently use the Redline. I love the redline. Needs less additive to get the same affect, and I believe that the Redline will take care of any water in the system as the PowerService doesn't?

Either way adding a good additive will help the car in keeping overall wear on a reduced level to the fuel system. It just might make the car run a bit nicer as well.

__________________
#dieselFLEET
---------------
'97 E300
'99 E300

Your car should run fine on diesel with no additives. Read about tuning.

How much PS do you add per tankful. I believe my wagon has a 15 gallon tank and I have been using about 8 oz. of PS silver.

__________________
Bill Reimels
Now down to one:
1972 300SE 3.5 W109 (Euro delivery)

Make your own diesel additive -- biodiesel. Just a liter or so every tank. Might be cheaper than PS even if buying new vegetable oil. Use Heet and Red Devil, dump the glycerine.

__________________
'83 240D with 617.952 and 2.88
'01 VW Beetle TDI
'05 Jeep Liberty CRD
'89 Toyota 4x4, needs 2L-T
'78 280Z with L28ET - 12.86@110
Oil Burner Kartel #35

http://i16.photobucket.com/albums/b1...oD/bioclip.jpg

I don't mean to hi-jack this, but I was wondering how much my wagon's tank holds. I think the book said it holds 17 plus one gallon for reserve. Then again mine is a 83.....I don't know if that makes any difference.

__________________
-Randy Wakefield

1969 220D 4 speed (parts car)
1976 280C
1976 280S
1981 240D 4 speed (parts car)
1982 300D
1983 300TD (Ivory)
1983 300TD (gold)
1985 300TD (gray)
1987 190D 2.5
1970 280SEL (sold)
1977 240D 4 speed (sold)
1974 280 (rusted to death)
---
1927 Chevy 4 door sedan
1938 Chevy 2 door sedan
1950 Willys Jeepster
1955 Studebaker President 4 door
1977 Ford F250
1979 Glastron 17'
1948 John Deere A
1960 John Deere 2010
1979 Satoh S650G
--
2000 Bichon (Doby)

Before we go on with your penny squeezing techniques of MB maintainence of not replacing fuel filters as preventative maintainence because supposedly a dirty filter actually filters better than a clean one (yes I researched your posts), the guy ran Power Service through his fuel system, which has detergent like properties. I'm thinking perhaps the additive stirred up some dirt, giving the fuel system a rather good cleanout and possibly clogging the fuel filters causing power loss and rough running. It's not a load of BS as you say. If he took my advice to change the fuel filters, he would probably check the filters first before working to see whether or not they actually need replacing. If they didn't need replacing, he could just simply keep the others as spares.
-Joe

__________________
'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.

If there is reason to be suspicious of a fuel filter, take it off and dump the contents into a container. A bowl or something will be fine. You will be able to easily see if the filter has sediment or water and judge if it needs replacing or not. I no krud is found, fill it with fresh fuel and put it back on

Edit: Another thing.... Additives that remove water.... Where do you suppose the water ends up?? Hint: I'm getting to be an expert on this from dealing with the fuel tank problems on my 240D.

__________________
Palangi

2004 C240 Wagon 203.261 Baby Benz
2008 ML320 CDI Highway Cruiser
2006 Toyota Prius, Saving the Planet @ 48 mpg
2000 F-150, Destroying the Planet @ 20 mpg



TRUMP .......... WHITEHOUSE
HILLARY .........JAILHOUSE
BERNIE .......... NUTHOUSE
0BAMA .......... OUTHOUSE

Sorry for late reply. Bought the car about 8K miles ago. Used Stanadyne Performance Formula immediately after purchase and eliminated smoking especially if I floor it on take off. I honestly did not think the performance difference was that much. Well, may be that was because of the dirty filters I had because I had to change filters about 4k miles ago, including air filter when I started having performance problems (lack of acceleration). That's when I also switched to PS because it's easier to find. Car was faster than it was when I bought it but I thought that was because of the cleaner filters.

I am not talking of a big problem here but I can tell the engine is working harder and rougher than before.

__________________
1981 300SD 118K
2000 Toyata Tundra 64K