[DeTomaso] ZF Gear Lube Question

[MikeLDrew at aol.com]

In a message dated 5/29/10 15 53 12, pantdino at aol.com writes:


> One cannot assume that what was called GL5 in 1973 is the same thing 
> being sold today, so that is of questionable validity.
> 

Uh...what?   

GL5 is a very specific standard which is unchanged; it consists of a set of 
highly standardized tests that must result in specific minimum values.   
Your statement is like saying that a 1973 inch might be longer or shorter than 
a 2010 inch!

Now, most oils today state that they exceed the GL5 standard (SAE J2360 is 
a much more rigid standard, established initially by the US military, and 
one that uses GL5 as its starting point, then adds to it with various 
performance benchmark tests; most oils today meet this higher standard), so while it 
may be true that most 2010 oils are better than 1973 oils, the minimum 
standard that is established by GL5 is still the same standard.

http://www.lubrizol.com/DrivelineAdditives/AutomotiveGearOil/GL5.html

Mike