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#1761143 - 01/29/10 08:55 PM Lowest temperature for 10W30 oil
snuffy300 Offline


Registered: 05/05/09
Posts: 14
Loc: Canada
Hi there,

Have a fill of Shell 10W30 dino. Over the last week we have had a few days here where the temperature is about 0 Fahrenheit (-17 celcius).

Is it safe to continue use of 10W30? I normally switch to 5W30 in the winter, but have been traveling. Car starts up a bit slow. But nothing too unusual. I usually warm up for 2 min then drive.

Thanks

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#1761148 - 01/29/10 09:08 PM Re: Lowest temperature for 10W30 oil [Re: snuffy300]
labman Offline


Registered: 03/14/03
Posts: 8711
Loc: Nothern USA
I went through some ghastly winters in 77-78 with 10w-30. Like 20-30 f below. I would never go back to it, but you should be OK.

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#1761150 - 01/29/10 09:10 PM Re: Lowest temperature for 10W30 oil [Re: snuffy300]
sangyup81 Offline


Registered: 10/24/09
Posts: 1647
Loc: Bowie, MD
throw in some MMO if you are worried

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#1761151 - 01/29/10 09:11 PM Re: Lowest temperature for 10W30 oil [Re: snuffy300]
bepperb Offline


Registered: 01/10/08
Posts: 4923
Loc: Milwaukee, WI
Depends on the battery....

Seriously, I'd be most worried about needing a jump. There's lots of theoretical whatever about slow flow at startup, and there's probably some truth to it, but plenty of vehicles running 15w-40 even at those temps with no significantly increased wear.

Now start the timer until someone from somewhere with one day a year below freezing starts talking about block heaters.....
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#1761152 - 01/29/10 09:11 PM Re: Lowest temperature for 10W30 oil [Re: snuffy300]
CATERHAM Offline


Registered: 11/18/05
Posts: 9780
Loc: Burlington, Ontario, Canada
Yes it's safe, but why bother with such an "old school" grade.
5W-30 dino is perfectly fine in the summer for normal OCI's.

But heck, a 5W-30 syn is so superior in our Canadian winters and can be had on sale for not much more than dino, it's quite frankly false economy not to use it.
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#1761160 - 01/29/10 09:15 PM Re: Lowest temperature for 10W30 oil [Re: CATERHAM]
Carzzz Offline


Registered: 01/26/08
Posts: 424
Loc: Toronto, ON, Canada
Formula Shell 10W-30 has a pour point of -33C!

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#1761170 - 01/29/10 09:24 PM Re: Lowest temperature for 10W30 oil [Re: Carzzz]
CATERHAM Offline


Registered: 11/18/05
Posts: 9780
Loc: Burlington, Ontario, Canada
Am I supposed to be impressed? I'm not.
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94 Caterham 7 Sustina 0W-20 80%/0W-50

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#1761175 - 01/29/10 09:27 PM Re: Lowest temperature for 10W30 oil [Re: CATERHAM]
sangyup81 Offline


Registered: 10/24/09
Posts: 1647
Loc: Bowie, MD
Originally Posted By: CATERHAM
Am I supposed to be impressed? I'm not.


+1
Pour points under -50C is where it's at!

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#1761186 - 01/29/10 09:35 PM Re: Lowest temperature for 10W30 oil [Re: CATERHAM]
Carzzz Offline


Registered: 01/26/08
Posts: 424
Loc: Toronto, ON, Canada
Originally Posted By: CATERHAM
Am I supposed to be impressed? I'm not.


I think OP uses FS 10W-30 and just want to give out a fact to the OP!

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#1761190 - 01/29/10 09:43 PM Re: Lowest temperature for 10W30 oil [Re: Carzzz]
Corvette Owner Offline


Registered: 01/22/03
Posts: 1661
Loc: Waldorf, Maryland
My Corvette specifies 5W-30 or 10W-30 oil, it says 10W-30 should only be used down to 0 F.
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#1761191 - 01/29/10 09:43 PM Re: Lowest temperature for 10W30 oil [Re: Corvette Owner]
sangyup81 Offline


Registered: 10/24/09
Posts: 1647
Loc: Bowie, MD
Yeah because pour point only tells part of the story. It'll pour but will it turn well in an engine?

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#1761217 - 01/29/10 10:10 PM Re: Lowest temperature for 10W30 oil [Re: Carzzz]
38sho Offline


Registered: 10/23/09
Posts: 446
Loc: North Palm Beach
Originally Posted By: Carzzz
Formula Shell 10W-30 has a pour point of -33C!



we use this for our bulk oil, even down in south florida winters, we notice a big difference in its flow out of containers and from pumps on drums even in 50 degree temp range.....

I would much rather use a 5w-30 oil year round then 10w-30 anymore.....
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#1761218 - 01/29/10 10:11 PM Re: Lowest temperature for 10W30 oil [Re: sangyup81]
ernied Offline


Registered: 05/02/07
Posts: 303
Loc: ogdensburg new york
awa come off it iused 10-30 wheh it was -30 below and my cars started with no problem encoundered.
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#1761220 - 01/29/10 10:11 PM Re: Lowest temperature for 10W30 oil [Re: sangyup81]
Bluestream Offline


Registered: 09/13/03
Posts: 4295
Loc: Waterloo, ON
I have used 10W30 down to -40 and it's fine
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#1761227 - 01/29/10 10:21 PM Re: Lowest temperature for 10W30 oil [Re: snuffy300]
Doug Hillary Offline


Registered: 05/30/03
Posts: 4915
Loc: Airlie Beach Australia
Hi,
snuffy300 - Typically engine Manufacturers specify 10W-30 lubricants down to around -15F and 5W-30 lubricants to around -22F. These are continuous temps so spasmodically below a little won't be an issue. As others have alluded to though it may "test" the battery and starter a bit!
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Doug

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