SURVEY - Whats your Oil Pressure reading at start up?
 

Im doing a survey of 3 different readings of your cars oil pressure.
TO START
MAKE
MODEL
YEAR
MILEAGE
#1 )at cold start up
#2 )after 20 minutes of driving, then ,at a stop
#3 ) the car at 30 mph or more after 20 minutes of driving

Designed to make light of your diesels oil pressures health and some recommended remedies that may be needed for follow up service.

Keep em runnin for a long ,long time.

1984 300D
148K on engine
3 bar at start up
Slightly above 2 bar at idle after 20 minutes
3 bar running at 30 mph.

1982 300D
180.5K

Old Gauge (replaced due to leak)
3 bar at start up
1.8 bar at idle after 20 minutes
3 bar if rpm over 1800

New Gauge
3 bar at start up
2.2 bar at idle
3 bar if rpm over 1800

Lesson: quite a bit of variability in the gauges....

3 bar on startup.
1.2 bar on warm idle
.9 bar when the engine is too warm after a highway drive with a bad fan clutch.

Any application of the throttle moves the gauge to the top.

-Jason

83 300D 309,000 miles
1. 3 bar
2. 1.5 bar
3. 3 bar at anything over about 1200 rpm

77 240D 228,000

same as above.

90 300D 2.5T
121K
1. 3+ bar after about a second
2. 1.5ish bar at hot idle, as little as 1.2 after running hard. Fluctuates between 1.5 and 2 bar as oil cooler thermostat opens and closes.
3. 3+ bar at anything over 1500RPM.

1980 300D
159K on engine
3 bar at start up
Slightly above 2 bar at idle after 1/2 hour @70-80mph
3 bar running at 30 mph, and 3 bar at anything much above idle.

1982 300SD - 280k on engine
1. 3+ bar
2. 2.1 bar
3. 1.9 bar
3+ bar above 1100 rpm even when hot

1990 300E - 138k on engine
1. 3+ bar
2. 1.8 bar
3. 1.4 bar
3+ bar at anything above 1300rpm even when hot

Both engines are running Shell Rotella 5w40 Synthetic Diesel Oil

My dad and brother's diesels show about the same pressure behavior as my diesel does

1984 300CD
Replacement engine - mileage unknown
3 bar at start up
Roughly 2.25 bar at idle after 20 minutes (or how ever long it takes to get above 85*C)
3 bar running at 30 mph.

Mine jumps from 2.25 at idle to 3 bar almost instantly off idle. By the time the engine hits 1000 RPMs it is pegged at 3 bar...

1983 240D 4-speed standard
1. 3 bar
2. 1-1.5 bar
3. 3 bar
No tach, but oil pressure hits 3 at anything but idle.

1983 300sd
284000 miles
3.0 bar at start
~2.0 bar at warm idle
3.0 bar with almost any throttle input

1981 300D
225K on engine
3 bar at start up
1.75 @ idle warm engine
3 bar above idle

15w40< external temp 80 degrees

1982 240D Automatic -
3 bar at startup.
Min around .9 bar hot idle in D or 1.2 bar hot idle in N.
2.5 - 3 bar hot at 30 mph (depending on gear & rpm)

1981 240D 4-speed -
3 bar at startup.
Around 1.5 - 2 bar hot idle.
3 bar hot at 30 mph.

1984 Euro 300TD 5-speed -
3 bar at startup.
Around 1.8 - 2.2 bar hot idle.
3 bar hot at 30 mph.

Speedometers on all have been repaired or replaced so actuall mileage is unknown, but estimate around 200K.

Happy Motoring, Mark

1987 300D
255,000 miles
1) pinned (3 bar)
2) a little over 2 bar
3) pinned

1978 240D
364,000 miles
1) pinned (45 PSI)
2) a bit over 30 PSI
3) pinned
... this 240 I've only had since January and have only put about 200 miles on it, but those readings have been consistent.

I don't know my Jeep's oil pressure, since it doesn't have real gauges ... plus I assume you meant MBs only.

280E / 1977 / ≈ 150K

#1 ) @ cold start up: > 45 psi / > 3 bar
#2 )after 20 minutes of driving, then, @ a stop: ≈ 20 psi / ≈ 1.5 bar
#3 ) the car @ 30 mph or more after 20 minutes of driving: > 45 psi / > 3 bar

Using: Mobil 1 - 0W40

1979 240d, 146k miles.

1 second after starting - 3 bar
After 20 minutes, 2.25 - 2.5 bar
Anything above low idle pegs the needle on 3 bar, instantly.

Right now my car has 0-40 full synthetic.

83 300sd
161k miles
1 - 3 bar at cold idle
2 - 1.5 bar at warm idle
3 - 3 bar warm at 1200+ rpm

1990 300d
192k miles
1 - 3 bar at cold idle
2 - 1.8 bar at warm idle
3 - 3 bar warm at 1000+ rpm

1987 W201 OM602 approx 180k - 200k miles (odo was broken for several years)
1. 3 bar pegged
2. Just under 1.5 bar
3. 3 bar pegged
3 bar achieved at about 1500 RPM

Oil is Mobil1 0W-40
(I think the oil type and grade would be a very worthwhile addition to all these posts.)

My additions
1983 & 1984 300cd #s are the same-83 stopped at 233k,84 stopped at 244k
1) pegged
2) 1.8 bar
3) pegged
1985 300cd -stopped at 303k /newer motor and trannie
1) pegged
2) 1.9 bar
3) pegged
1985 300cd - 63k car- unusual rare low mileage car
1) pegged
2) pegged -not driven due to tags but ran for 20 minutes
3) pegged
All use rotella 15/40
The 190d car I sold always read alittle lower after warm up than the 300d model ,not sure why.

1985 300SD - 148,000 miles

1) 3 bar
2) 2.2 bar
3) 3 bar

1985 300D
198,000+ miles (slow odo, wrong brass gear)
Rotella 5/40 fake syn.

1.) 3 bar pegged
2.) 1.8 bar
3.) 3 bar pegged

MAKE MB
MODEL 300SDL
YEAR 1986
MILEAGE 307500
(Gauges from 1981 300SD so the oil pressure does not have a hard stop at 3bar)
#1 )at cold start up 3+ Bar
#2 )after 20 minutes of driving, then ,at a stop 1.7 to 2bar
#3 ) the car at 30 mph or more after 20 minutes of driving 3+bar (as soon as the engine revs over 1000RPM. the pressure goes right up)

Im doing a survey of 3 different readings of your cars oil pressure.
TO START
MAKE : W124 300D 2.5 (OM602.962)
MODEL: 300D 2.5
YEAR: 1992
MILEAGE: 290K
#1 )at cold start up: 3Bar+
#2 )after 20 minutes of driving, then ,at a stop 1+ BAR
#3 ) the car at 30 mph or more after 20 minutes of driving 3+BAR

Designed to make light of your diesels oil pressures health and some recommended remedies that may be needed for follow up service.

Keep em runnin for a long ,long time.

1981 300td 236,850
 

300 TD
1981
236,850

Start - 3.0
Idle - 1.8-2
Runs at 3.0 almost immediately

300D
'82
262,500

1) 3 bar (pegged)
2) 1.5+ or 1.5 w/a/c compressor engaged and in drive
3) 3 bar (pegged) at or over 1000 rpm.

79 240 d
310,664 mi when odo stopped
1) after 7-10 seconds climbs to 45 psi
2) after a good hard run up the hill drops to 30+
3) always pins guage right off idle

Schaeffers 5/40 9000 series full syn.

I think trere may be something wrong in my oil filter houseing?

1987 300 SDL, 214k, Shell Rotella "synthetic" 5w40
1. 3 Bar upon startup
2. 30 minutes of highway followed by idle pressure of 1.3-2.1 Bar (bouncing needle)
3. 3 Bar at 30 mph when warm or cold.

1981 300SD, 319,375, Delo 400 CI 4+ 15w-30.
1. 3+ bar at cold start.
2. 1.6 bar 80 Deg Celsius eng temp at idle
3. 3+ bar at 20 when warm or cold in third.

3+ bar on startup
1.8 bar hot idle
3+ bar above 1200 rpm
Shell Rotalla T 15-40

1982 300D, 67k miles

1) 3 bar
2) 3 bar
3) 2.5 bar

85 300D 344950 miles on chassis,
13,010 miles on engine

1. 45 PSI

2. 20 - 25 PSI

3. 45 PSI

using 15-40 Amsoil Marine Diesel Synthetic

gauge out of 78 240D

Charlie