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What's the effect of idling a car on oil? #4555615
10/26/17 08:51 PM
10/26/17 08:51 PM
Joined: Jul 2017
Posts: 542
Texas (south)
FermeLaPorte Offline OP
FermeLaPorte  Offline OP
Joined: Jul 2017
Posts: 542
Texas (south)
How does idling a car, let's say an inline 4, affect oil life?


Always Mobil 1
2014 1.6L Nissan Versa Sedan, 5 spd, 5k OCI.
2011 3.5L Chevrolet Impala, Automatic, 5k OCI.
Re: What's the effect of idling a car on oil? [Re: FermeLaPorte] #4555622
10/26/17 08:56 PM
10/26/17 08:56 PM
Joined: Oct 2016
Posts: 232
California
jj51702 Offline
jj51702  Offline
Joined: Oct 2016
Posts: 232
California
Ask all the 4 cylinder ford escapes and Prius vehicles in New York working as taxis and idling all day

Re: What's the effect of idling a car on oil? [Re: FermeLaPorte] #4555623
10/26/17 08:57 PM
10/26/17 08:57 PM
Joined: Aug 2003
Posts: 12,908
NE,Ohio
Rand Offline
Rand  Offline
Joined: Aug 2003
Posts: 12,908
NE,Ohio
All engines are different.. but a generic rule would be.

1 hour of idling is about the same as driving 25 miles.

so 100 hours of idling = 2500 miles.

according to ford anyway.. but it seems reasonable.
https://www.fleet.ford.com/truckbbas/non-html/DeiselTips/DLSIDLETIMESS.pdf


2019 Jeep Cherokee Trailhawk 2.0T
Re: What's the effect of idling a car on oil? [Re: Rand] #4555653
10/26/17 09:19 PM
10/26/17 09:19 PM
Joined: Jan 2007
Posts: 17,501
Clovis, CA
Merkava_4 Offline
Merkava_4  Offline
Joined: Jan 2007
Posts: 17,501
Clovis, CA
Originally Posted By: Rand
1 hour of idling is about the same as driving 25 miles.


Are you saying the fuel usage is the same ?

Re: What's the effect of idling a car on oil? [Re: Merkava_4] #4555663
10/26/17 09:30 PM
10/26/17 09:30 PM
Joined: May 2012
Posts: 1,400
Georgia
AVB Offline
AVB  Offline
Joined: May 2012
Posts: 1,400
Georgia
Originally Posted By: Merkava_4
Originally Posted By: Rand
1 hour of idling is about the same as driving 25 miles.


Are you saying the fuel usage is the same ?
The linked flyer states the effect on the oil is the same, it doesn't mention fuel consumption or what speed those 25 miles were driven. In this example they are mostly talking about the high pressure oil pump's effect on the oil.

Re: What's the effect of idling a car on oil? [Re: FermeLaPorte] #4555676
10/26/17 09:44 PM
10/26/17 09:44 PM
Joined: Aug 2008
Posts: 3,172
USA
Reddy45 Offline
Reddy45  Offline
Joined: Aug 2008
Posts: 3,172
USA
Isn't fuel dilution a problem when you idle a lot?

Re: What's the effect of idling a car on oil? [Re: FermeLaPorte] #4555745
10/26/17 10:48 PM
10/26/17 10:48 PM
Joined: Dec 2016
Posts: 6,269
Waco, TX
Linctex Online content
Linctex  Online Content
Joined: Dec 2016
Posts: 6,269
Waco, TX
Idling a gasoline engines is typically no big deal, especially the newer EFI vehicles.

Diesel engines are another matter altogether - you'll kill a big Cat or Cummmins from too much idle time. The newer "emissions control" diesel engines will cost you HUGE $$$$ from too much idle time.


"The evidence demands a verdict".
(Re:VOA)"it's nearly impossible to actually know the particular additives that are in there at what concentrations."
Re: What's the effect of idling a car on oil? [Re: FermeLaPorte] #4555794
10/26/17 11:47 PM
10/26/17 11:47 PM
Joined: Oct 2014
Posts: 3,907
Utah
CKN Offline
CKN  Offline
Joined: Oct 2014
Posts: 3,907
Utah
On the newer cars the OLM can account for periods of long idling.

Re: What's the effect of idling a car on oil? [Re: FermeLaPorte] #4555804
10/26/17 11:57 PM
10/26/17 11:57 PM
Joined: May 2013
Posts: 2,093
Saskatchewan, Canada
Johnny2Bad Offline
Johnny2Bad  Offline
Joined: May 2013
Posts: 2,093
Saskatchewan, Canada
Idling (or "excessive idling" which is really the problem, not idling in the normal course of stop-and-go traffic or startup) is going to have a much greater effect on the wear components of the engine itself, regardless of the oil used, and relatively little effect on the oil itself, assuming a reasonable Oil Change Interval (OCI).

Not sure about the diesel idling thing; having worked in the far north where no diesel motor is shut down 24/7 unless it has heated indoor storage (and there isn't enough of that to go around) so spending 12 hours idling overnight is a normal operating condition unless operated over two 12-hour shifts. Same with half to one ton pickups ... nobody shuts them down and they are inevitably diesels, no gas motor light trucks.

Reason is simple, if you shut it down, two hours later (can be less, if wind cools the vehicle) it will never start with out aids (running a flex pipe from the exhaust of another running diesel to the engine compartment, then covering with a tarp for an hour or so is the usual method). Boost (or "Jump") starting isn't going to be enough by itself on a cold motor. Yes, it's cold, below -45F, I've seen it at -52F.

In any case, many of these trucks and heavy equipment run long hours or miles, as good as any warm-weather example. I see no evidence there is a detriment to the additional idling.


'57 FL Straight 50 wt
'90 Miata 1.8L w/Rotrex Supercharger [Mobil1 0W-40]
'96 Ram 1500 [3.7L Mobil1 0W-20 / 1L 15W-50]
'01 PT Cruiser [Mobil1 0W-40]
Re: What's the effect of idling a car on oil? [Re: Johnny2Bad] #4555830
10/27/17 01:34 AM
10/27/17 01:34 AM
Joined: Jun 2014
Posts: 1,750
Rijeka, EU
chrisri Offline
chrisri  Offline
Joined: Jun 2014
Posts: 1,750
Rijeka, EU
Dad told me that years back ( late seventies, early eighties) before Webasto they would idle all night long for heating the sleep cabin. Even today some trucks don't have stand alone air conditioner so on that he would leave truck working for the whole weekend (south of Italy and Spain is terrible during summer).


02 Nissan Terrano 2.7.TDi Motul 15w40
06 FIAT Stilo MW 1.9 Multijet SHU 5w40
07 Opel Vectra SW 1.9 CDTI 150 MST 5w40
Re: What's the effect of idling a car on oil? [Re: FermeLaPorte] #4555838
10/27/17 01:49 AM
10/27/17 01:49 AM
Joined: Mar 2008
Posts: 5,841
South Florida
bubbatime Offline
bubbatime  Offline
Joined: Mar 2008
Posts: 5,841
South Florida
My daily driver is getting WAY more idle time than I prefer. The parent pick up line at school adds 30-45 minutes of idle time every single day.

I changed from dino to synthetic for piece of mind, although I doubt it matters.


17 Chrysler Pacifica Mobil 1 5W30
13 Yamaha XT250 Valv MC 10W40
12 Suzuki S40 Rotella 15W40
10 Acura TSX 2.4 PZL Plat 5W30
06 GMC Sierra Nextgen 10W30


Re: What's the effect of idling a car on oil? [Re: FermeLaPorte] #4555876
10/27/17 05:16 AM
10/27/17 05:16 AM
Joined: Feb 2015
Posts: 487
NC
Matagonka Offline
Matagonka  Offline
Joined: Feb 2015
Posts: 487
NC
It's not that bad. Think of all the idling you do at traffic lights.

Re: What's the effect of idling a car on oil? [Re: FermeLaPorte] #4555899
10/27/17 05:47 AM
10/27/17 05:47 AM
Joined: Jul 2007
Posts: 4,212
Midwest USA
LoneRanger Offline
LoneRanger  Offline
Joined: Jul 2007
Posts: 4,212
Midwest USA
Check fleet operations for police. That's where you'll find passenger car engines idling the most for extended periods. Taxi's I would think would be shutting 'er down more often since the fuel is often on the driver's dime (independent contractors).



'09 Subaru Forester ...................(QS HM 5W30)
'16 Moto Guzzi Stelvio 1200 .....(ENI i-Ride PG 10W60)
Re: What's the effect of idling a car on oil? [Re: FermeLaPorte] #4555963
10/27/17 07:27 AM
10/27/17 07:27 AM
Joined: Dec 2004
Posts: 426
Dayton,Ohio
ShotGun429 Offline
ShotGun429  Offline
Joined: Dec 2004
Posts: 426
Dayton,Ohio
My daily driver, a ex police Crown Vic, has 8000 plus idle hours on it PLUS 100,000 miles and it seems no worse for the wear, runs great. Ford Fleet manual says every idle hour is equal to 33 road miles.

Re: What's the effect of idling a car on oil? [Re: FermeLaPorte] #4556105
10/27/17 10:09 AM
10/27/17 10:09 AM
Joined: Feb 2010
Posts: 1,623
Imperial Valley, California
Jeffs2006EvoIX Offline
Jeffs2006EvoIX  Offline
Joined: Feb 2010
Posts: 1,623
Imperial Valley, California
I have read but not confirmed that in Direct Injected Engines idling for "excessive" periods of time may contribute to quicker accumulation of deposits on the intake valves.

I just cant pin point where I read that. It makes sense though.

Look at a generator for example. They are gas powered, and diesel and they run all day. So if you do this, I would switch to your vehicles "severe" usage service interval for Engine oil.

Just my ten cents..


Jeff


"You don't have to be crazy to do this... But it helps." Bob Ross.
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