Suggestions to perform a warm oil flow test?

[Ed_Flecko]

There's a few videos out there (youtube, etc.) of people demonstrating the flow of cold oil at below freezing temperatures, but I've never seen anyone test the flow of oil at normal, i.e., "room temperature".

I'm guessing that nobody has done a "warm" oil test because they think that all oils (i.e., 0W, 5W, 10W, etc.) flow pretty much the same if the ambient temperature is 60, 80, or even 100 degrees. The motor might be cold...but on startup, all oils will flow and therefore, reach all moving parts at the same time regardless of grade?

I'm skeptical that's true, but I'd also be interested in testing that theory. I work at a College that, of course, has an auto shop, Chemistry lab, Physics lab, etc. I'm thinking the instructor(s) might find this an interesting test so I'll bet I could recruit someone(s) to help me.

Given the resources I have at my disposal, can you offer some suggestions on how I might set up for such a test(s) so the end results are accurate? I welcome your suggestions.

Thank you,
Ed

 

[Garak]

Compare KV100 values. The tests have already been done.

 

[Jetronic]

and kv40 values

 

[2sld3kf2bt]

Search for the post on here where some guy heated up oil on the stove in his mother's kitchen. That was a great thread.

https://bobistheoilguy.com/forums/ubbthreads.php/ubb/showflat/Number/3618227

Here it is, it wasn't to do a pour test, it was to show how heat darkens oil. Either way it is a good read.

 

[Ed_Flecko]

Originally Posted By: Jetronic
and kv40 values


Great, thanks.

Where do I find more information on testing for KV100 and KV40 values?

Ed

 

[ARCOgraphite]

Release say 250ml of fluid through a funnel and calc "time to empty" or time for 100ml.
You can buy Paint viscosity funnels.

Also the ball (marble) drop in a tall test tube can be timed.

Otherwise almost all oil PDF show K40 viscosity which is at approx. 100 F.

 

[OneEyeJack]

You could read through the details of some of the ASTM standard high temperature oil tests that are used today, like the ASTM D6082-12 for foaming. There are lots of other such tests that are well described in the literature.

 

[geeman789]

Originally Posted By: Ed_Flecko


I'm guessing that nobody has done a "warm" oil test because they think that all oils (i.e., 0W, 5W, 10W, etc.) flow pretty much the same if the ambient temperature is 60, 80, or even 100 degrees. The motor might be cold...but on startup, all oils will flow and therefore, reach all moving parts at the same time regardless of grade?

I'm skeptical that's true ...


You are splitting hairs... at any temp above say 60* F , the differences between a 20 grade and a 50 grade, although obvious on paper, will be of much less consequence when initially pumped thru the engine. Positive displacement pumps move oil... about the same amount every cycle, regardless of viscosity. The difference in pumping times will be measured in fractions of a second, or maybe a second at most. Not really worth worrying about...

 

[Garak]

Originally Posted By: Ed_Flecko
Where do I find more information on testing for KV100 and KV40 values?

You'd probably have to buy the testing protocols. What I'm saying is, don't do the tests. We have KV40 and KV100, and VI can be calculated from that, which will allow you to extrapolate viscosity at any reasonable ambient temperatures above 0 C.