A buddy of mine said that in his 83' 240D he puts a quart of of ATF in with the diesel every other fill up and he claims that it cuts down on the nosie of the engine. Does this really help or would it cause problems down the road?

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1980 300D European
"The Red Fox"
200,000 miles

2003 Chevrolet Silverado

609 Certification

If anything it increases lubricity and quiets the IP(the source of most of the racket). I use a gallon of house brand soy oil during warm weather per tank of diesel, works the same.

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'02 BMW 325i
'85 300D 450k
'93 190E 2.6 170k(killed by tree)
'08 Ducati Hypermotard 1100S 6k
'06 Ducati S2R800 14k(sold)

B20 does the same thing.

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Jim

Jim are you getting your B20 at a military filling station? There's B20 for sale here locally but it's at some military-affiliated filling station over in Arlington or Alexandria.

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'02 BMW 325i
'85 300D 450k
'93 190E 2.6 170k(killed by tree)
'08 Ducati Hypermotard 1100S 6k
'06 Ducati S2R800 14k(sold)

I heard that there is an additive in newer transmission fluid that does harm to our IP's I'm not 100% sure on this.

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-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)
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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)

From what I was told, trans fluid boosts the cetane level in your tank and supposedly can help diagnose a problem by seeing how it changes your smoke color or opacity, or something like that, I was young then and didn't listen too close. oops!

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1980 500SE/AMG Euro
1981 500SEL Euro
1982 380SEL
1983 300TD
1983 500SEC/AMG Euro
1984 500SEC
1984 300TD Euro
1986 190E 2.3-16
1986 190E 2.3
1987 300D
1997 C36 AMG
2003 C320T 4matic

past: 1969 280SE 4.5 | 1978 240D | 1978 300D | 1981 300SD | 1981 300SD | 1982 300CD | 1983 300CD | 1983 300SD | 1983 380SEC | 1984 300D | 1984 300D | 1984 300TD | 1984 500SEL | 1984 300SD | 1985 300D | 1986 300E | 1986 560SEL | 1986 560SEL/Carat | 1987 560SEC | 1991 300D 2.5 | 2006 R350

What makes it quieter:
#1. Power steering fluid, one pint - one quart per tank.
#2. ATF, Dexron, Mercon, DEXRON/MERCON, one pint - one quart per tank.
#3. Any SVO, one quart - one gallon per tank.
#4. Marvel Mystery Oil, one pint-one quart per tank.
#5. Any WVO, one gallon per tank.
#6. Bad valve adjustment.

Warning:
SVO and WVO will give the fuel tank and system the ultimate cleaning = flush all the crud out = possible plugged filters.
Do NOT use this unless you carry spare filters and tools.

__________________
ASE Master Mechanic
asemastermechanic@juno.com

Prototype R&D/testing:
Thermal & Aerodynamic System Engineering (TASE) Senior vehicle instrumentation technician.
Noise Vibration and Harshness (NVH).
Dynamometer.
Heat exchanger durability.
HV-A/C Climate Control.
Vehicle build.
Fleet Durability
Technical Quality Auditor.
Automotive Technical Writer

1985 300SD
1983 300D
1984 190D
2003 Volvo V70
2002 Honda Civic

https://www.boldegoist.com/

Running wvo sure made a difference for me. Its pretty quite compared to other old diesels I hear running around on dino diesel.
Big Grin

Bad or good valve adjustment?

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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

as in the valves have lost their clearance and therefore are lowering the effective compression, resulting in much reduced combustion noise.

A bad valve lash (valve Clarence) will make a diesel almost as silent as a gasoline engine, but it steals power and wrecks MPG.
I heard a 1974 300D yesterday that was too quiet, followed them to fuel station, it has NO power, they owned the car since new, never adjusted valves, it is their Sunday driver only, current miles = 86,000
The sad part is rust showing in all the worst places, they washed paint, but never under car + drove it in Michigan winter.
Best guess:
Needs valve adjust = $140.00 USD + rust repair and full paint = $14,000.00 USD.

This would have been perfect for my rust thread, caught without my camera.

Note:
It has never been to dealer since purchase.

You can buy it there.....Its at the NEX station next to the Pentagon off columbia Pike........the Alternative fuel pumps are open to the public. Thats were I have been buying fuel.

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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)
---------------------
Section 609 MVAC Certified
---------------------
"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

They must have been rich to have purchased such an expensive vehicle only to use it so rarely.

Regarding the slow speed of the car, perhaps it is because of the disregard for proper maintenance that gives diesels their great reputation for being slow. Surely our diesels aren't as fast as gasoline cars, but they aren't as slow as their reputation makes them out to be. My 300SD has no trouble keeping up with traffic.

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1999 Mercedes-Benz S600, 103K miles - garage queen
1988 Mercedes-Benz 560SEL, 89K miles - daily driver
2007 Hyundai Sonata Limited, 31K - daily driver

Yeah, they're not slow at all, I was out with my dad again this morning visiting a factory for some stuff, and on the way to Holland, MI, we hit 107mph (the '83) on the freeway without too much effort (pedal was no where near the floor). Pushing some REAL rpms at that speed though

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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)

Where do you guys get to hit those crazy speeds without getting in trouble with the police? In my area everywhere you go you either can't hit that speed due to traffic or the police or both.

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1999 Mercedes-Benz S600, 103K miles - garage queen
1988 Mercedes-Benz 560SEL, 89K miles - daily driver
2007 Hyundai Sonata Limited, 31K - daily driver