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#4460325 - 07/15/17 05:05 PM Oil Temperature and moisture
LZ1989 Offline


Registered: 07/15/17
Posts: 12
Loc: Upstate NY
with all this talk about engine temp and whether to run a hot thermostat or not. What does everyone think the min temp for engine oil to reach to get rid of condensation and water. Im not talking about going on short rides. I mean an hour drive, at what temp should the oil/coolant be to safely burn off the water.

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#4460340 - 07/15/17 05:28 PM Re: Oil Temperature and moisture [Re: LZ1989]
blupupher Offline


Registered: 08/27/04
Posts: 4421
Loc: Katy, Republic of Texas
Interesting question. The answer of "30 minutes at normal operating temp" is a standard answer, but what is "normal"?
195F coolant temp does not always equal "normal" oil temp.
_________________________
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2002 Ford F150: GTX HM 5w-20/EcoGard Syn/1yr OCI
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#4460355 - 07/15/17 05:51 PM Re: Oil Temperature and moisture [Re: LZ1989]
Johnny2Bad Offline


Registered: 05/20/13
Posts: 1810
Loc: Saskatchewan, Canada
Don't quote me, but I seem to recall a sustained 160F measured in the sump is good for cooking off moisture. Obviously the hotter the better, so maybe that isn't such a good answer, but it's the one in my head. Oil is pretty happy at around 220F, but ideally not much higher.

Plus there is the issue of where, exactly, you are measuring the oil temperature. There will be a wide variation, even in the same motor, depending on where you are picking up the temp.

That's why they say to watch your oil temperature when it goes higher than the typical number for your vehicle, rather than giving a specific temperature to watch for.

If I were concerned about it (I'm not) and wanted more info, I'd be looking at the higher reputation oil cooler manufacturers for guidance, so that's where I would be pointing my Google search terms.

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#4460358 - 07/15/17 05:58 PM Re: Oil Temperature and moisture [Re: LZ1989]
SHOZ Offline


Registered: 06/28/03
Posts: 5746
Loc: Illinois
My oil runs 20-40F hotter than the 180F coolant on my Gen Coupe 2L turbo. But water evaporates at about any temperature, especially when the PCV system is pulling fresh air into the motor.
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#4460471 - 07/15/17 08:48 PM Re: Oil Temperature and moisture [Re: LZ1989]
LZ1989 Offline


Registered: 07/15/17
Posts: 12
Loc: Upstate NY
I have a 2.3l quad 4. so thermal cycling and high heat were killers of these motors. But I'm just hoping the 160 degree thermostat will keep the car warm enough without creating increased engine wear.

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#4460476 - 07/15/17 08:58 PM Re: Oil Temperature and moisture [Re: LZ1989]
Ducked Offline


Registered: 10/25/12
Posts: 4360
Loc: Taiwan
There's a MSc thesis on oil-life monitoring algorithms (2nd one down in the "interesting papers" forum) that I thought would answer this question, but from a quick look it doesn't, though I might have missed it.

Tests on short-tripping are discussed in terms of ambient temperatures, rather than actual oil temperatures. (25C ambient is said to prevent water accumulation).

The algorithm implemented assumes an optimum temperature of 80C, though water accumulation is only one of the factors mentioned.

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#4460573 - 07/16/17 01:04 AM Re: Oil Temperature and moisture [Re: Ducked]
oil_film_movies Offline


Registered: 06/13/16
Posts: 2559
Loc: MN
Originally Posted By: Ducked
The algorithm implemented assumes an optimum temperature of 80C, though water accumulation is only one of the factors mentioned.


The range of 80 deg C (176 deg F) to 140 deg C (284 deg F) works the best.

From Noria http://www.machinerylubrication.com/Read/77/gm's-oil-life-system-improves-timing-of-oil-change

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#4460641 - 07/16/17 06:42 AM Re: Oil Temperature and moisture [Re: LZ1989]
LZ1989 Offline


Registered: 07/15/17
Posts: 12
Loc: Upstate NY
I think I'm going to get a oil temp gauge and stick it in the oil pan next oil change, and keep an eye on the temps. The oil gets changed at 3,000 miles no matter what anyways, its not a daily driver. So I'm thinking even at a 160 thermostat the oil is reaching 176. Unless its mostly highway driving then I'm not sure.

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#4460661 - 07/16/17 07:31 AM Re: Oil Temperature and moisture [Re: LZ1989]
LZ1989 Offline


Registered: 07/15/17
Posts: 12
Loc: Upstate NY
actually it looks like I may not do that. It seems to be a PITA to get one adapted to the drain plug, ill have to do some more looking around.

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#4460664 - 07/16/17 07:36 AM Re: Oil Temperature and moisture [Re: LZ1989]
SHOZ Offline


Registered: 06/28/03
Posts: 5746
Loc: Illinois
My oil filter adapter had a nice flat spot that was easy to drill and tap for a sensor.
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#4460672 - 07/16/17 07:49 AM Re: Oil Temperature and moisture [Re: LZ1989]
Shannow Offline


Registered: 12/12/02
Posts: 39858
Loc: 'Stralia
Originally Posted By: LZ1989
actually it looks like I may not do that. It seems to be a PITA to get one adapted to the drain plug, ill have to do some more looking around.


Get a multimeter with a type K thermocouple....do your thing, pull over, and drop the thermocouple down the dipstick hole which is into the area of drainback from the reciprocating/rotating assembly...cheap enough, and you'll be surprised.

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#4460849 - 07/16/17 11:22 AM Re: Oil Temperature and moisture [Re: Shannow]
LZ1989 Offline


Registered: 07/15/17
Posts: 12
Loc: Upstate NY
Originally Posted By: Shannow
Originally Posted By: LZ1989
actually it looks like I may not do that. It seems to be a PITA to get one adapted to the drain plug, ill have to do some more looking around.


Get a multimeter with a type K thermocouple....do your thing, pull over, and drop the thermocouple down the dipstick hole which is into the area of drainback from the reciprocating/rotating assembly...cheap enough, and you'll be surprised.



Wow that is a good idea actually, Ill have to do that!

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#4460975 - 07/16/17 02:12 PM Re: Oil Temperature and moisture [Re: LZ1989]
barryh Online   content


Registered: 01/09/16
Posts: 312
Loc: Cheshire, England
It's not so much about oil temperature as length of run. 80 C (176 F) is more than enough to get rid of condensation as long as the engine is not used only on short runs.
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1979 BMW R45 (Triple QX 5W40)
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#4460991 - 07/16/17 02:28 PM Re: Oil Temperature and moisture [Re: LZ1989]
steve20 Offline


Registered: 06/19/07
Posts: 3475
Loc: Morris County NJ
Originally Posted By: LZ1989
I have a 2.3l quad 4. so thermal cycling and high heat were killers of these motors. But I'm just hoping the 160 degree thermostat will keep the car warm enough without creating increased engine wear.


FWIW I think it depends on how far 'upstate' you are--equal to, or north of Albany, I doubt the 160 will be enough to get you sufficient heat inside the car
Steve
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#4461012 - 07/16/17 03:02 PM Re: Oil Temperature and moisture [Re: steve20]
LZ1989 Offline


Registered: 07/15/17
Posts: 12
Loc: Upstate NY
Its just a summer car, the heater won't be used. well parallel with Albany.

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