cold flow

[zrxkawboy]

Does anyone know which conventional oil has the best cold flow characteristics? I will soon begin an ARX treatment in a '96 Intrepid 3.5, so I will need a conventional oil. SD winters can get cold, so I want the oil that will provide the best protection in a cold start situation. Thanks in advance.

Jeff

 

[Bob Miller]

Havoline has a good cold flow spec - [5700 -30]
Valvoline Maxlife [5500 -30]

 

[Dr. T]

Yes...that would be a 5W as 0W's only come in synth/synth blends. That said, a 5w-20 will be somewhat better than a 5w-30 or 5w-40(also synth. only).

 

[JonS]

Citgo 5w-30 is 5490 at -30

 

[wwillson]

Mobil Drive Clean 5000 5w-20:

CCS, cP 5100@ -30°C

Pretty darn good

 

[Idoxash]

NICE ... so what's Castrol GTX and how do you find out this INFO?

--Idoxash--

 

[LarryL]

Castrol GTX

 

[reyjay1]

Notice in this case (GTX) the 5-30 pumping viscosity at -35 is actually better than the 5-20 and at the same CCv at -30. This also bears out what I felt about Castrol oils in general, across the board they seem thicker at cold temps /until reaching operating temp than most other brands.
could the 5-30 in this case be using a higher percentage of higher group basestock than 5-20?

 

[Blue99]

Unfortunately, Castrol lists this cold temp data as the maximum requirement for the grade and it is not the actual test results.

In other words, "Yawn, yeah it meets da spec."

6600 @ -30C is the 5W oil requirement, 7000 @ -25C is the 10W grade requirement.

The Low Temperature Pumping requirement is 60,000 cP across the board at a different temp for each grade.

The Castrol GTX 5W-30 is listed at 40,000 and the 10W-30 at 50,000 to indicate that these grades meet the GM 6094M cold flow spec.

Note - Most 5W-30 dino's are around 25,000 @ -35C, Valvo All Climate is 22,000 cP pumping viscosity.

 

[mikemc]

The current SM rated Conoco and Phillips 5w20 and 5w30 syn blends have cold crank values of 3,700@-30 and 5,300@-30 respectively. They may be the value leaders in cold flow oils.

 

[Idoxash]

Is it me or does Castrol really don't like talking about their oil?