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What's the effect of idling a car on oil? #4555615 10/26/17 07:51 PM
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FermeLaPorte Offline OP
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How does idling a car, let's say an inline 4, affect oil life?

Re: What's the effect of idling a car on oil? [Re: FermeLaPorte] #4555622 10/26/17 07:56 PM
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jj51702 Offline
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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 07:57 PM
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Rand Offline
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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
2020 Hyundai Elantra "Value Edition"
Re: What's the effect of idling a car on oil? [Re: Rand] #4555653 10/26/17 08:19 PM
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Merkava_4 Offline
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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 08:30 PM
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AVB Offline
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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 08:44 PM
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Reddy45 Offline
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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 09:48 PM
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Linctex Offline
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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 10:47 PM
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CKN Offline
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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 10:57 PM
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Johnny2Bad Offline
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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 12:34 AM
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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 Total 5w40
06 FIAT Stilo MW 1.9 Multijet SHU 5w40
07 Opel Vectra SW 1.9 CDTI 150 Motul 5w40
Re: What's the effect of idling a car on oil? [Re: FermeLaPorte] #4555838 10/27/17 12:49 AM
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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.


2019 Honda CRV 1.5T factory bulk
2017 Chrysler Pacifica SuperTech synthetic 5W20
2013 Yamaha XT250 Valvoline motorcycle 10W40
2006 GMC Sierra SuperTech high mileage 5W30

Re: What's the effect of idling a car on oil? [Re: FermeLaPorte] #4555876 10/27/17 04:16 AM
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It's not that bad. Think of all the idling you do at traffic lights.


2018 Mazda 3 Touring HB 2.5
Re: What's the effect of idling a car on oil? [Re: FermeLaPorte] #4555899 10/27/17 04:47 AM
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LoneRanger Offline
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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).



'19 Ford F150 2.7 twin turbo GDI V6 .....(Motorcraft 5W30 SN+)
'19 GMC Terrain 1.5 turbo GDI I4...........(GM 0W20 dexos2)
'16 Moto Guzzi 1151cc air cooled v-twin (Eni 10W60)
Re: What's the effect of idling a car on oil? [Re: FermeLaPorte] #4555963 10/27/17 06:27 AM
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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 09:09 AM
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Jeffs2006EvoIX Offline
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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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