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Old 01-27-2007, 03:16 PM   #1
wrxrex
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Default 10W30 engine oil ok for -5F weather?

On back of Mobil oil 10W30 case, it says it provides protection for temperature as low as -40C (IIRC). Is it really safe to use for that extreme temperature? Here in NY, I am seeing weather as low as -5F and makes me wonder if it is safe to drive with 10W30 oil.

I see many shops using 5W30 oil for winter- Is it really necessary to switch to 5W30 although -5F is within mfg allowable specification limit?
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Old 01-27-2007, 03:23 PM   #2
Unabomber
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-1 for posting in the wrong forum
-2 for not reading the sticky threads in the right forum
-3 for not reading the lettering that is imprinted on your oil fill cap under the hood of your car.
-4 for not consulting your owners manual

After all those point deductions I'll still gladly move this to the right forum with the hope you'll be more considerate next time.
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Old 01-27-2007, 04:23 PM   #3
TheMadScientist
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Meh 10-40 is my "winter" oil.

TMS
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Old 01-27-2007, 07:27 PM   #4
Hayes
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-5 And you don't clarify which Mobil oil your talking about.
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Old 01-28-2007, 02:15 AM   #5
DFL2.5RS
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wow, so many deductions :-P

For what it's worth, I run 0W-40 in the winter and love it.... that's right 0W-40.... great for cold starts (car starts right up) and the oil still protects well once it's warm It's really popular with the boosted VW boys too!
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Old 01-28-2007, 12:13 PM   #6
Mike Wevrick
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Yes, use 5W30; why would you not want to?
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Old 01-28-2007, 01:20 PM   #7
Maccgyver
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5w30 all the time that is what the factory manual states but 10w30 can be used in the warmer months for sure.
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Old 01-28-2007, 01:20 PM   #8
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Quote:
Originally Posted by TheMadScientist View Post
Meh 10-40 is my "winter" oil.

TMS


me too. keep in mind all oils are not created equally.
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Old 01-28-2007, 01:36 PM   #9
TheMadScientist
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Quote:
Originally Posted by hondaeater69 View Post
me too. keep in mind all oils are not created equally.
I use whatever they have cases of 10-40 dino. I went with ALL the super duper synth and synth-blends. I settled on dino oil as lonk as you change it. I use everything from costal to quakerstate.
In the summer it is 20-50 dino, same deal.

TMS
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Old 01-28-2007, 01:55 PM   #10
hondaeater69
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Quote:
Originally Posted by TheMadScientist View Post
I use whatever they have cases of 10-40 dino. I went with ALL the super duper synth and synth-blends. I settled on dino oil as lonk as you change it. I use everything from costal to quakerstate.
In the summer it is 20-50 dino, same deal.

TMS

my comment was more in regards to differnet types of oils and the viscosity differences among them. I use expensive oil, but i also run it 2 and 3 times longer than conventional oil so that more than makes up for the price difference. the oil i use tends to be a little thinner than normal 10-40, so i can get away with it in the winter. while i use a 20-50/10-40 mix in the summer.
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Old 01-28-2007, 03:13 PM   #11
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Quote:
Originally Posted by Maccgyver View Post
5w30 all the time that is what the factory manual states but 10w30 can be used in the warmer months for sure.
ya never REALLY read the manual DID YA???

NO...ya did NOT
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