Freezer test!

[Drew99GT]

The Trop Artic 10w30 could possibly by the smallest of margins pass the 5W CCS test; it already is 3500 Cp at -25C. It would EASILY pass the 5W MRV test as it's 13,000 Cp at -30C; the limit for 5W is 60,000 Cp at -35C.

And to say it's not accurate at all to extrapolate an oils abilities from viscosity index is wrong. Your gonna tell me
that an oil with say, a kinematic viscosity of 4,000 Cst at 0 F is not better at that temp than one that's 2500 Cst?

I agree, at the margins of where MRV and CCS tesing is done, by definition a 5W will beat a 10W. That's why I said it above in the 1st place! And GTX 5w30 was about on par with the 10w30 Trop Artic in my home oil testing unit (complete with Taco Bell Star Wars glasses and Totinos party pizzas). 10w30 GTX was like a brick. Do a search, I made that observation about a year and a half ago.

 

[bruce381]

You are correct but as far as pour and CCS when the oils get down to "thicken" time they can not be guessed at by VI alone sorry the DI Package aswell as other additives and the base oils will not behave in a linear way I have done enough ASTM CCS and Pour points to say maybe sometime you can guess but not all the time.


"Your gonna tell me
that an oil with say, a kinematic viscosity of 4,000 Cst at 0 F is not better at that temp than one that's 2500 Cst?"

You right All I'm saying is you can not guess based on VI or pour pt.
Unless you run a CCS or MRV you may be wrong
Bruce

 

[Drew99GT]

I'm probably totally wrong and dumb for even using 10w30 during winter but it rarely gets below 0 in my area. Despite the assumption, Colorado doesn't get that cold. Dr. Hass will probably shake is finger at his computer screen after reading this. I know I just activated Murphey's law and we will set a record for like 50 below 0 this year

 

[bruce381]

you might try your freezer tests with used Dino oil most would look very bad after use.
bruce

 

[Drew99GT]

Bruce, have you CCS or MRV tested used oils (synthetic and dino)? If so, what were the results?

 

[bruce381]

once or twice and as I remember the Dino oils were OFF spec most likley due to PPD oxidizing and thus not offering the wax control. As compared to fresh the SYn not needing a PPD would stay on grade as far as PP went.
bruce

 

[Drew99GT]

quote:

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Originally posted by Ignatz:
Is there a protocal for a freezer test? Special test containers with synronised valves at the bottom of the vessel? Or are we filling up Camp Snoopy glasses with oil, setting them in the freezer overnight and seeing how fast they empty into a Fred Flinstone glass. Everything I test in the petroleum industry as a mechanic has a protocal to follow. If I don't follow the protocal, it's not a valid test. Sometimes my state DEP officer will request a copy of the protocal along with the test results to make sure I'm not trying to pull the wool over their eyes.

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Yes, that is my protocol, except I use Taco Bell Star Wars cups circa 1985.

Gary, the Mobil 1 10w30 pours about equal to other dino 10w30s (except Castrol GTX which is practically solid); perhaps like .1 seconds faster. The Trop Artic pours noticeably faster.

 

[Dick in Falls Church]

Protocol? Repeatable tests (like ASTM)? Scientific methods?

Come on, you don't want to spoil the fun, and please don't try to confuse anyone with facts.

 

[Gary Allan]

quote:

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Everything I test in the petroleum industry as a mechanic has a protocal to follow. If I don't follow the protocal, it's not a valid test. Sometimes my state DEP officer will request a copy of the protocal along with the test results to make sure I'm not trying to pull the wool over their eyes.

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How can a Berks countian function in such a rigid regulatory environment?? Squeezing a quarter until it bleeds dimes is not only a lifestyle, it's a mandate

btw- I used to work at the, now closed, C&K plant in Gibraltar

quote:

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Gary, the Mobil 1 10w30 pours about equal to other dino 10w30s (except Castrol GTX which is practically solid); perhaps like .1 seconds faster. The Trop Artic pours noticeably faster.

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Very interesting. I guess the spec's are properly assigned. A 10w30 is a 10w30 where they are close within the range.

quote:

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Yes, that is my protocol, except I use Taco Bell Star Wars cups circa 1985.

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