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#4648201 - 01/27/18 05:02 PM 10w30 & low temps
Camprunner Offline


Registered: 02/19/08
Posts: 1037
Loc: MA.
What is the lowest outside temperature you feel comfortable running a 10w30 synthetic?

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#4648204 - 01/27/18 05:05 PM Re: 10w30 & low temps [Re: Camprunner]
eljefino Offline


Registered: 06/15/03
Posts: 32774
Loc: ME
Regularly or irregularly?

My F150 turned over and caught at -17'F on Nextgen green bottle, whatever that is, syn-blend?

If I were somewhere with a winter climate and HAD TO start unaided I'd go with at least a 5w30 synthetic. But the truck sits in my driveway and I fire it up only to go to the dump. If it chooses not to go there's always the next day.

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#4648208 - 01/27/18 05:14 PM Re: 10w30 & low temps [Re: Camprunner]
Jimzz Offline


Registered: 10/03/14
Posts: 1170
Loc: NoVA
All the synthetic 10w30 oils I have seen have a -30 pour point or lower. Even most conventional 10w30 has around a -30 pour point.

Heck 20w50 is rated around -20 pour point.

People forget cars use to come with straight 30 weight and would still go 100k if taken care of.
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yup

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#4648209 - 01/27/18 05:18 PM Re: 10w30 & low temps [Re: Camprunner]
OVERKILL Offline


Registered: 04/28/08
Posts: 36602
Loc: Ontario, Canada
Acknowledging it is allowed to slip a grade in service, no lower than the CCS temp, which is -25C.
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2018 RAM 1500 Big Horn EcoDiesel
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#4648244 - 01/27/18 06:14 PM Re: 10w30 & low temps [Re: Camprunner]
Cujet Offline


Registered: 02/15/03
Posts: 7238
Loc: Jupiter, Florida
As I've posted before, Mobil 1 5W-30 and 10W-30 flow significantly better in cold temperatures than other commonly available oils.

https://www.youtube.com/watch?v=uQ_vxdO_9nc
_________________________

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#4648249 - 01/27/18 06:17 PM Re: 10w30 & low temps [Re: Camprunner]
MolaKule Offline


Registered: 06/05/02
Posts: 19135
Loc: Iowegia - USA
-35F in an '03 PathFinder, no problem starting it.


Edited by MolaKule (01/27/18 06:21 PM)

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#4648263 - 01/27/18 06:32 PM Re: 10w30 & low temps [Re: Camprunner]
hemitruck Offline


Registered: 03/18/11
Posts: 386
Loc: new jersey
My first car was a ,67 Cutlass. Called for 10/40 WT oil. This was in 74, so no synthetic at the time. Started fine in below 0 degrees.

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#4648270 - 01/27/18 06:39 PM Re: 10w30 & low temps [Re: Camprunner]
barkingspider Offline


Registered: 12/22/13
Posts: 2064
Loc: socal
In my old 02 s10, I had 10w30 (I think it was syn blend) that sat for a weekend where overnight it reached -4F. Started up and ran fine the next morning. In my vehicles, Im comfortable using 10w30 above 0 degrees F.
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#4648271 - 01/27/18 06:40 PM Re: 10w30 & low temps [Re: Camprunner]
Snagglefoot Offline


Registered: 12/31/17
Posts: 1908
Loc: SE British Columbia, Canada
Do you have a diesel or Gas engine. No auto manufacturers have recommended 10w-30 in a gas engine in over 20 years. Use 5W-30 instead. If its a Diesel engine you are excused.


Edited by Snagglefoot (01/27/18 06:42 PM)

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#4648272 - 01/27/18 06:40 PM Re: 10w30 & low temps [Re: barkingspider]
Quattro Pete Offline


Registered: 10/30/02
Posts: 35965
Loc: Great Lakes
Originally Posted By: barkingspider
Im comfortable using 10w30 above 0 degrees F.

+1
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#4648286 - 01/27/18 06:53 PM Re: 10w30 & low temps [Re: Camprunner]
Snagglefoot Offline


Registered: 12/31/17
Posts: 1908
Loc: SE British Columbia, Canada
The ASTM cold cranking test is done at -25 C (13 F). 10W-30 starts OK at this temp. However, why induce more cold weather wear than is necessary? Using 5W-30 is a better solution.


Edited by Snagglefoot (01/27/18 06:58 PM)

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#4648292 - 01/27/18 06:56 PM Re: 10w30 & low temps [Re: Snagglefoot]
bbhero Offline


Registered: 03/20/15
Posts: 4730
Loc: Virginia
-25C equals -13F I believe. And -30C equals -22F. And at -40 they are both the exact same.
_________________________
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"Treat your family like your friends and treat your friends like your family."

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#4648304 - 01/27/18 07:13 PM Re: 10w30 & low temps [Re: Quattro Pete]
SR5 Offline


Registered: 07/07/15
Posts: 4517
Loc: Down Under
Originally Posted By: Quattro Pete
Originally Posted By: barkingspider
Im comfortable using 10w30 above 0 degrees F.

+1

+2

At 0F (-20 C) you should start with no problems with a good battery, and as many have commented, much lower is possible. But to me 0F and below would be when I would select a 5W30, above that I like the shear stability and low volatility of a 10W30.
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Penrite Vantage 10W40 SN & A3/B4 + Wesfil-Cooper Z154

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#4648305 - 01/27/18 07:13 PM Re: 10w30 & low temps [Re: Camprunner]
Linctex Offline


Registered: 12/31/16
Posts: 6186
Loc: Waco, TX
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"The evidence demands a verdict".
(Re:VOA)"it's nearly impossible to actually know the particular additives that are in there at what concentrations."

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#4648310 - 01/27/18 07:19 PM Re: 10w30 & low temps [Re: OVERKILL]
fdcg27 Offline


Registered: 09/25/09
Posts: 15838
Loc: OH
Originally Posted By: OVERKILL
Acknowledging it is allowed to slip a grade in service, no lower than the CCS temp, which is -25C.


Which would be -13F and still pretty darn cold.
Realistically, most of us in the lower forty eight will never see temperatures cold enough that a 10W grade oil would be a problem.
Even lower overnight temperatures won't usually matter since they typically aren't sustained long enough to chill the oil in the sump to the ambient temperature of an only briefly reached low.
There is also always the option of a sump heating pad, which makes the W grade of the oil irrelevant.
One of these would also be nice on one of our below zero mornings, since warmed oil makes for a warm engine and faster heat to demist the windows and warm the driver without a lot of idling.
You don't see these much here on gassers, but I did see the tell-tale AC hanging out on local gassers on a drive through South Dakota and Montana.
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