reality-HT/HS

[priler]

i'm interested in knowing what are the real differences in how HT/HS of an oil is measured.

there is ASTM D4741,D4683,D5481. how many different contraptions/ways are there? what are the real word differences?(as it relates to the oil in my engines)

an explanation of the differences within each test/device would be nice,but i'm much more interested in knowing how one can be compaired to the others.

for example,specifically,lets say a particular oil has been spec'ed at 4.5 HT/HS using ASTM D4741.what would be the value/number if D4683 was used?....or D5481? answering this question alone would be most helpful.

.....or,taking it the other way around,if it's 3.6 using D4683,than what would it be using D4741 or D5481?

i'm thinking the difference may be something as small as .1 or .2(or there about) between them.does anyone know?

by the way,i have read the descriptions of the different contraptions used but i'm much more interested in knowing how one can compare one oil to another that uses the different test.

 

[Gary Allan]

I'll eagerly await answers. I researched the costs of the tapered plug test (I forget the ASTM "D" number) it was expensive ($275).

You could default on my view. I don't give a darn. I don't have anything that has a power density that will likely test even the lowest HTHS rating for SAE purposes. I also probably would not obsess on it even if I did ..yet never played Fast&Furious and drive Euro old geezer style.

 

[Doug Hillary]

Hi,
priler - As with most things we tend to lack precision and take Licence with matters today. This leads to variability and the disadvantage of meaningless comparative data

The best HTHS comparison IMO is to seek the CEC L-036-90 (Ravenfield -UK) method. This is the only one used by ACEA. It is similar to the ASTM's D4741 method

 

[priler]

Originally Posted By: Gary Allan
I'll eagerly await answers. I researched the costs of the tapered plug test (I forget the ASTM "D" number) it was expensive ($275).

You could default on my view. I don't give a darn. I don't have anything that has a power density that will likely test even the lowest HTHS rating for SAE purposes. I also probably would not obsess on it even if I did ..yet never played Fast&Furious and drive Euro old geezer style.





LOL!!...

 

[Doug Hillary]

Hi,
Gary - A Happy and prosperous New Year to you.

I just wanted to say that unlike you I'm an old geezer who drives Fast&Furious - Euro style!

 

[Gary Allan]

Originally Posted By: Doug Hillary
Hi,
Gary - A Happy and prosperous New Year to you.

I just wanted to say that unlike you I'm an old geezer who drives Fast&Furious - Euro style!


Of that I have no doubt, sir. One cannot help but admire how you do all things with such gusto and along the lines of excellence.

Happy New Year!