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BigK75
Dodge Dakota
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12/23/2003
10:00:16
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 Subject: 5w30 or 10w30 in winter
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Message:
Guys,
I live in Southern Ontario Canada, with weather pretty much like Detroit has. The manual suggest putting in 5w30 oil as perferred when the temperature gets below 0 degrees celcius(32 degrees F). Do I need to go to 5w30 or can I stick with 10w30(I have about 15 litres in the garage). My engine is the 3.9. I also use conventional oil like Castrol GTX.
Claude
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timberwolf
GenIII
12/23/2003
10:46:26
| RE: 5w30 or 10w30 in winter
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Message:
Not giving advice, but I've never changed to 5w in the winter in and I've been driving for over 20 years and never had a problem.
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teamfast
Dodge Dakota
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12/23/2003
11:51:04
| RE: 5w30 or 10w30 in winter
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Message:
Ottawa here, run 5w in the winter 10w in the summer.
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AmsoilSponsor
DakotaEnthusiast
12/23/2003
11:56:04
|  Amsoil 5w-30 or 10w-30 in Winter
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Message:
I thought this would help everyone. -----
VISCOSITY..in the general term is defined as " a fluids resistance to flow". it's a measure of the internal friction of the fluid or the resistance to the movement of one layer of molecules relative to an adjacent layer.
THE LOWER (SMALLER or FIRST #, as in "10w-_) NUMBER.. is the Cold Cranking measurement, made at low temperatures, using a concentric cylinder viscometer to predict the oils cranking resistance in an engine during cold starting.
The measuring devices, or viscosmeters, most often used are in the form of close-fitting concentric cylinders. The fluid being evaluated is placed between the cylinder walls, the outer cylinder is held stationary and the inner cylinder is rotated. The speed of rotation is measured for a given force to calculate the viscosity, most commonly reported in cp or centipoise units. Also known as Absolute Viscosity.
THE HIGHER (BIGGER or SECOND #, as in "-30") NUMBER...is commonly measured in capilary tubes, in which the time for a fixed volume of fluid to flow through the tube under gravity at operating temp (100c)is measured and reported as cSt or centistokes. This is used most commonly to report the normal operating viscosity of motor oils or the higher number.
-----
" 0W- " is a viscosity GRADE, not a viscosity MEASUREMENT.
When testing for cold fluidity, the temperature is lowered approximately 5 degrees centigrade between each test.
The Cold Crank Simulator Apparent Viscosity is tested at:
-20 C for 10W-
-25 C fpr 5W-
-30 C for 0W-
It is my understanding that the oil has to be labelled at the lowest temperature it meets the specifications.
It may not be long before someone comes out with a " -5W-30 " which would correspond with -35 C.
--------------------------------------------------
Unless you live in the Artic --- either would be fine.
Steven Roark , Amsoil Dealer , Proud Sponsor of www.DodgeDakotas.com
AMSOIL Synthetic Motor Oils, Lubricants, Filtration, and Truck Care Products
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AmsoilSponsor
DakotaEnthusiast
12/23/2003
11:58:15
| Amsoil 5w-30 or 10w-30 in Winter
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Message:
*arctic tundra (corrected spelling)
Steven Roark , Amsoil Dealer , Proud Sponsor of www.DodgeDakotas.com
AMSOIL Synthetic Motor Oils, Lubricants, Filtration, and Truck Care Products
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black crude
Dodge Dakota
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12/23/2003
19:11:30
| RE: 5w30 or 10w30 in winter
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Message:
I run 5w-30 year round
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Dr. D
Dodge Dakota
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12/24/2003
07:04:38
| RE: 5w30 or 10w30 in winter
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Message:
I use AMSOIL Synthetics (10w-30) year round to eliminate the need to switch back and forth between lower and higher viscocity oils in summer and winter.
The AMSOIL 10w-30 flows at like -76 degrees.
Just one of the advantages of using synthetics !
Dr. D
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BMarshall
Dodge Dakota
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1/31/2004
11:03:46
| RE: 5w30 or 10w30 in winter
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Message:
I switched to a 5w30 and boy-o-boy does my truck run better. Wind chills outside last week were -40 and my engine was getting slugish so I decided to switch. Everyone in cold weather should change over to a thinner oil. What a difference.
Bud
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Bill Nye
Dodge Dakota
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1/31/2004
11:28:11
|  RE: 5w30 or 10w30 in winter
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Message:
The "wind chill effect" only applies to humans (and any other living organism that "feels" cold). It has exactly zero effect on oil viscosity. Ambient temperature is all that matters to fluids in that respect.
I just like to use that physics trivia whenever I can.
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BMarshall
Dodge Dakota
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1/31/2004
17:27:01
| RE: 5w30 or 10w30 in winter
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Message:
ok smart___ physics teacher. The actual temp was -18 and the lower weight oil did make a difference.
Bud
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Bill Nye
Dodge Dakota
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1/31/2004
23:39:39
| RE: 5w30 or 10w30 in winter
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Message:
Arent you the science guy ?
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oh my god
Dodge Dakota
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2/01/2004
09:23:07
| RE: 5w30 or 10w30 in winter
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Message:
Bill Nye tried to teach BMarshall something and all BMarshall did was try to flame him, but BMarshall ended up looking like a jerk. BMarshall is an idiot and all should just leave him be when he is wrong, just like he was. He come across as an aragant "I know it all so don't tell me even when I am wrong" kind of guy so he can just go suck eggs, the little weasle
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