How many of you allow your diesel to idle before shutting it off? If you do not it destroys the turbo or if you have an aluminum head possibly worse.

I idle my car for about thirty seconds before shut-down. I use the time to deploy my dash protector, unbuckle, etc.

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'78 300D 310K Maple Yellow / Bamboo
'87 300D 81K Barolo Red / Safron (RIP @ 113K)
2003 E320 34K Pewter/Charcoal
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I let her idle down before I shut her off.

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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
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2000 Bichon (Doby)

Same here. Longer if I have been "getting on it" or from a high speed drive such as the interstate.

It takes me a few moments to detach the face off my radio, unfasten my seat belt, grab my briefcase, switch off the lights/wipers/climate control, and step on the parking brake. That amounts to about thirty seconds or so, which is what the owner's manual recommends from my understanding.

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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 usually let my car chill until the pyro reads around 400 degrees F (300 takes about 10min idling). This 400 usually takes about 45sec-1min.

My usual dirivn up 6 floors in the parking garage, 1st or 2nd gear, in boost, chirping around the corners, barking tires, setting off car alarms...

This usually makes things a tad warm so I let it cool down..

If I am late for class and have to beat feet quickly...I'll take it easy up the garage and shut it down sooner (30seconds-1min).

Always, I like to sit and listen to the engine for a while sometimes


*is truly sick.

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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 EGT's in the truck are always at/below 300* by the time I get to my driveway so I assume the gentle drive into my neighborhood is plenty of a cool down for either turbo vehicle. If I have just gotten off the highway then 30 seconds or so in either I think is plenty. RT

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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 concurr, it seems that 1,000-1200 RPM idling with little to no load drops the temps amazingly fast...

I don't seem to see where my book says that I have to or should idle down. Anyways, I changed to synthetic oil for better protection so I don't have to worry as much.

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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

I usually let it idle maybe 30 seconds or so after short city drives, but after a long turnpike drive where I maintain a run at 75-85mph I let it idle down maybe 60 sec. or so to prevent coking of the turbine.

I am not sure if it helps my car “NON TURBO” but I do
Only about 30 sec. though

No need to do it. That's why I run on synthetic oil.
I still do it sometimes though, depending on how much of a hurry I am.

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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

I do the 30 Second Ritual, except at rest areas on the interstate. Rest area stops are rushed, almost frantic, for me. The only plan I have been able to make work so far is to split my key rings, and leave it idling. I lock up with the master key, leaving the secondary key in the ignition. I'm back in a couple of minutes, and all is well.

The risky part of the thread? It looks like this is becoming an oil thread.

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Alan the Radio Guy
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Amateur Radio Station N7CEU
1985 300CD 199,000 and still rolling

I know... I thought of it right after posting my reply. Hey someone has to get it started you know.

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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