Now that is getting cooler, I was wondering if I am hurting something by not warming up before I get going.

Warming up for a minute feels like forever.

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Ben
1987 190d 2.5Turbo

I warm up for about 10 - 15 sec after full oil pressure . . . but then drive gently . . . we live in a development, and it is all flat . . .

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82 240D Manual 277K and still rolling!
02 Volvo S60 AWD For Sale

As long as you can Start the car then go inside and get your coffee or finish up and then come back. Both my car and truck have a very noticeable change when they are warm enough. It all depends on the temp outside. You will get a feel for it the more you drive.

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Veggie powered 01 F350 CCLB SRW "Tiny"
Soon to be veggie powered 82 300SD - "Squirt" Leaks oil like crazy

To avoid excessive fuel dilution of the engine oil, start driving as soon as the the engine runs smoothly. Do NOT "warm up" the engine.

I start it and drive. On shut down if I've pushed it I'll let it idle for a bit (a minute or so) to allow the turbo to cool down. I'm in Florida though. It doesn't often get below 30. Or let it idle till the windows are clear.
Guess the question is what are you trying to accomplish?

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92 300D 2.5L OM602 OBK #59

Very good advice, this is what MB engineers recommend, also the mixture is rich and in a cold engine with no load, incomplete combustion tends to leave heavy carbon deposits. Just drive gently, thats all.

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99 Gurkha with OM616 IDI turbo

2015 Gurkha with OM616 DI turbo

2014 Rexton W with OM612 VGT

Thirty seconds, until the afterglow light turns off. I have a 1/4 mile gravel driveway so slow driving is required to prevent throwing up clouds of dust. By the time I make it to the highway, the heat is almost ready to come on. Any more warming up is just wasting fuel. Going back into the house while the car warms up is a good way to get your car stolen.

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"Buster" in the '95

Our all-Diesel family
1996 E300D (W210) . .338,000 miles Wife's car
2005 E320 CDI . . 113,000 miles My car
Santa Rosa population 176,762 (2022)
Total. . . . . . . . . . . . 627,762
"Oh lord won't you buy me a Mercedes Benz."
-- Janis Joplin, October 1, 1970

I warm 15 minutes when below 50 degrees or less.I hate frozen steering wheels.Can't stand gloves.Always anemic.

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1999 w140, quit voting to old, and to old to fight, a god damned veteran

For light workouts and other activities I ususally don't warm up at all. If its going to get a little strenuous I might actually stretch a little before the get going. But for me, once I'm warmed up its easier to stretch, etc.

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1982 240 D, 308,000 - 321,127 miles (sold)
1982 300 TD,166,500 - 226,000 miles
1998 E 320, 120,000 - 144,000 miles
2005 C 230 K, 26,000 - 77,000 miles (sold)

Ben,

On a daily basis, I usually follow this procedure:

Switch on.

Buckle up.

Glow light off/crank.

Immediately head for the road keeping the shift RPM's around 1500 while on neighborhood streets.

Turn onto the SR, 45 MPH limit, raise shift RPM's to 2000, still gentle acceleration.

About 3 miles/5 min. later, enter the interstate still limiting RPM's to around 3000-3500.

Cruise on into work.

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-Evan


Benz Fleet:
1968 UNIMOG 404.114
1998 E300
2008 E63


Non-Benz Fleet:
1992 Aerostar
1993 MR2
2000 F250

The owner's manual recommends not to warm up at idle or when standing still.



Start the car, buckle up, check for oil pressure, drive gently.

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http://farm8.staticflickr.com/7271/7...144c3fc1dc.jpg

I just wait for oil pressure and drive away. (unless I need to clear snow/ice off the car, then it may idle a few mins while I do that)

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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)

The power is so low in cold weather after starting. It almost is required to let a 240d warm up enough to thin the oil a little if any amount of power is needed right away.

Synthetic oils may probably eleminate this to some degree. I have not tried them. Otherwise the cold oil drag in the engine is consuming a lot of the available power. I used to think the oil pump might have been the culprit. Still might be part of the issue.

After the oil pressure is up I shift to reverse and back out of the driveway. I take it easy though until the engine is up to temperature though.

One thing I have noticed is that even though the engine coolant is at operating temperature, the motor oil may not be. It takes a while for the idle oil pressure to fall to its normal hot oil position. Maybe 10 or 15 minutes. When cold, the idle oil pressure is 2 and when full hot maybe 1.6 or close to it.

So, once I think the oil is hot, then I will push the engine harder. I am using Delvac 15W40 by the way.

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1993 W124 300D 2.5L Turbo, OM602.962
2000 Chevrolet Cavalier, 2.4L DOHC
2002 Ford Explorer, 4.0L SOHC
2005 Toyota Prius, 1.5L

http://www.fuelly.com/sig-us/40601.png

I warm up any of my Vehicles gas or diesel 1-2 minutes if I have time for the 1st start up of the day.

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84 300D, 82 Volvo 244Gl Diesel