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-40 Celsius and 5w30 #5322125 01/14/20 12:48 AM
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apollo18 Offline OP
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Hello so this winter here in edmonton I was thinking of trying a 0w30 rather then a 5w30 but the gm dealership only had there 5w30 full synthetic and said that’s what they use for every vehicle year round. I guess this winter is colder then the past and it’s currently -36 outside without windchill and later in the week we going to be hitting -40 Celsius to -38 Celsius without wind chill. I always plug the block heater In and I hope it’s actuallt working but lately the truck has started fine when I remote start it. I was wondering if I made a big mistake going the 5w30 router rather then
0w30? Or Is the difference not that signification/only matters more at colder temps?

Thx

Re: -40 Celsius and 5w30 [Re: apollo18] #5322138 01/14/20 02:17 AM
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Char Baby Offline
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I believe the fact that you have a synthetic 5W30 is the key as synthetic can still flow when it's even colder outside. Maybe even closer to -50 C. so I think you're fine and your dealership is confident. And my thinking is, what did we do before 0W oils?


"Retired"
-----------------------------------

'80 Firebird FORMULA V8/4bbl-purchased "NEW"
'15 Nissan Altima 2.5 SV
'15 Honda Civic 1.8 LX
Re: -40 Celsius and 5w30 [Re: apollo18] #5322141 01/14/20 02:33 AM
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Mad_Hatter Offline
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You said you have a block heater so I wouldn't worry about it but fwiw your truck will still start up but might turnover a bit slower at that low temp. You may not even notice it. I'd be more worried about my battery than the oil (a 5wX).

Originally Posted by Char Baby
And my thinking is, what did we do before 0W oils?

We stayed home and drank..😂

Last edited by Mad_Hatter; 01/14/20 02:37 AM.
Re: -40 Celsius and 5w30 [Re: apollo18] #5322142 01/14/20 02:36 AM
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dave1251 Offline
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The fact you are using a synthetic is the biggest factor supporting you. About 40 years ago your options would be limited to a 10W30 group I and engines started and ran fine.


make the inside of your engine oil cap white.
don't use.
Re: -40 Celsius and 5w30 [Re: apollo18] #5322143 01/14/20 02:37 AM
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Shannow Offline
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-40, I'd personally got for the 0W.

That being said, the limit for the CCS and MRV for dexos are just over half the allowable, which should make a synthetic pretty close to a 0W (doubling of CCS/MRV per 5C).

A qualified oil is allowed to slip a grade in service, which should be moot with a proper synthetic...

You'll be fine, I'm sure...Iwould prefer 0W 'though.


If it's the truth....it can handle the pressure !!!
Re: -40 Celsius and 5w30 [Re: Char Baby] #5322149 01/14/20 03:54 AM
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edyvw Offline
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Originally Posted by Char Baby
I believe the fact that you have a synthetic 5W30 is the key as synthetic can still flow when it's even colder outside. Maybe even closer to -50 C. so I think you're fine and your dealership is confident. And my thinking is, what did we do before 0W oils?

That depends on pour point. Not all synthetics are created equal. Group III base stocks are not going to perform as well as Group IV, V or GTL. Many 5W30 oils have pour point around -40. For example Mobil1 5W30 Extended Performance has -42c bcs. it has healthy does of PAO base stocks. Many ILSAC GF-5 oils however will have higher pour point, somewhere around -38, -39c.
In Edmonton? I would run 0W30 all the time.


11' BMW 328i xDrive 6MT (BMW TPT 5W30+OE filter)
11' VW Tiguan 2.0T (Castrol 0W30+OE filter)
15' Toyota Sienna AWD (Mobil1 5W30 EP+OEM filter).
Re: -40 Celsius and 5w30 [Re: apollo18] #5322156 01/14/20 04:14 AM
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OilUzer Offline
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I am a thickie but during -40° winter and if I request 0W30, I wouldn't complain if 0W20 accidentally went in any of my newer cars shocked2 I would complain however if 5W went in by mistake!

btw, I would try to use block heater as much as possible plus 0W ...

Last edited by OilUzer; 01/14/20 04:23 AM.
Re: -40 Celsius and 5w30 [Re: OilUzer] #5322159 01/14/20 04:22 AM
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edyvw Offline
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Originally Posted by OilUzer
I am a thickie but during -40° winter and if I request 0W30, I wouldn't complain if 0W20 accidentally went in any of my newer cars shocked2 I would complain however if 5W went in by mistake!

If vehicle is specifying ILSAC GF-5 oils, than probably 0W20 might be good option.
Not sure what vehicle we are talking about?


11' BMW 328i xDrive 6MT (BMW TPT 5W30+OE filter)
11' VW Tiguan 2.0T (Castrol 0W30+OE filter)
15' Toyota Sienna AWD (Mobil1 5W30 EP+OEM filter).
Re: -40 Celsius and 5w30 [Re: apollo18] #5322163 01/14/20 04:34 AM
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demarpaint Offline
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I'd run a 0W-xx oil.


God Bless Our Troops

Re: -40 Celsius and 5w30 [Re: apollo18] #5322174 01/14/20 05:26 AM
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Snagglefoot Online Content
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You will be fine with the block heater and even if you have to do a cold start at work or somewhere else it will still start. However, for next winter I would suggest you try a 0w30 as they are now more commonly available. I have Pennzoil Euro LX 0w30 in my Burb. There is a whole selection of 0w30s out there to chose from. You can use one of those infrared laser heat guns to check if your block heater is working or simply put you hand on a valve cover to feel for the warmth. smile

Last edited by Snagglefoot; 01/14/20 05:56 AM.

If you want the job done right......do it yourself.
Re: -40 Celsius and 5w30 [Re: Shannow] #5322192 01/14/20 06:10 AM
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Snagglefoot Online Content
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Originally Posted by Shannow
-40, I'd personally got for the 0W.

That being said, the limit for the CCS and MRV for dexos are just over half the allowable, which should make a synthetic pretty close to a 0W (doubling of CCS/MRV per 5C).

A qualified oil is allowed to slip a grade in service, which should be moot with a proper synthetic...

You'll be fine, I'm sure...Iwould prefer 0W 'though.


This. Completely correct. But I had to pause because the Aussie is telling a guy from Edmonton how to start a car in -40 weather. Shannow is a man of many talents. smile

Last edited by Snagglefoot; 01/14/20 06:11 AM.

If you want the job done right......do it yourself.
Re: -40 Celsius and 5w30 [Re: apollo18] #5322225 01/14/20 07:23 AM
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Virtus_Probi Offline
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I think that all that can be said for sure is that a 0W30 is going to give you a better shot to start in an extreme cold condition than a 5W30 with the same mileage/usage.
With a block heater, assuming that it is working, 0W vs. 5W isn't going to make a difference.
If the power goes out or your block heater fails, you might be fine in your conditions with a 5W30...but a 0W30 is a better percentage play.
As somebody else mentioned above, your battery condition is probably even more important than your oil choice!
Good luck!


2014 Forester XT, 111000 miles
Last Change;
M1 0W30 AFE
Tokyo Roki 15208AA170 filter
Re: -40 Celsius and 5w30 [Re: Snagglefoot] #5322227 01/14/20 07:24 AM
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Virtus_Probi Offline
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Originally Posted by Snagglefoot
Originally Posted by Shannow
-40, I'd personally got for the 0W.
That being said, the limit for the CCS and MRV for dexos are just over half the allowable, which should make a synthetic pretty close to a 0W (doubling of CCS/MRV per 5C).
A qualified oil is allowed to slip a grade in service, which should be moot with a proper synthetic...
You'll be fine, I'm sure...Iwould prefer 0W 'though.

This. Completely correct. But I had to pause because the Aussie is telling a guy from Edmonton how to start a car in -40 weather. Shannow is a man of many talents. smile

Going totally off topic here, but, have you been affected by the wildfires, Shannow?
Heartbreaking to see the pics on the news here in the US...


2014 Forester XT, 111000 miles
Last Change;
M1 0W30 AFE
Tokyo Roki 15208AA170 filter
Re: -40 Celsius and 5w30 [Re: Mad_Hatter] #5322235 01/14/20 07:34 AM
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Originally Posted by Mad_Hatter
You said you have a block heater so I wouldn't worry about it but fwiw your truck will still start up but might turnover a bit slower at that low temp. You may not even notice it. I'd be more worried about my battery than the oil (a 5wX).

Originally Posted by Char Baby
And my thinking is, what did we do before 0W oils?

We stayed home and drank..😂



Oh my Goodness another male bonding event that has gone by????


2004 Corolla 138272
Out: Havoline Pro DS 10w-30 Purolator PureOne 10-29-19 136457
In: Pennzoil Platinum HM 5W-20 ST 4386
2006 Duramax 77060
Out: T6 5W-40 XG9100 73909
In: Rotella Dino PH9100 11-3-19
Re: -40 Celsius and 5w30 [Re: dave1251] #5322282 01/14/20 08:47 AM
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ARCOgraphite Offline
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Originally Posted by dave1251
The fact you are using a synthetic is the biggest factor supporting you. About 40 years ago your options would be limited to a 10W30 group I and engines started and ran fine.


I missed school a couple times the old '65 buick didn't turn over.

I think I had Esso gold 10W30 or Sinclair in there.

I think you are forgetting that cars use to be hard to start in the extreme cold.

But maybe you didn't live in a cold area in the 60's and 70's

Last edited by ARCOgraphite; 01/14/20 08:48 AM.

2019 VW Jetta S 6MT OCI#2 7378mi-MOTUL Specific VW508.00+VW Service Filter; '17 Subaru Crosstrek CVT OC#8 60864mi-Subaru Idemitsu 0W20 + SOA Filter
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