Changed By: grant Change Date: October 07, 2013 02:52PM Hoo boy - lots of good advice here - but also lots of "except that..."
I dont have timeo go through this line by line, but there are a bunch of subtle points being lost.
I kist had one of the lead formulation guys from BP lubricants (aka Castrol, BP) in to speak to NNJR-PCA. Note that BP makes its own base stock adn holds some of the patents.
I have input from a number of labs that I have shared. I cannto share the source. I recently arranged for one of the lead formulation guys from BP lubricants (aka Castrol, BP) in to speak to NNJR-PCA. Note that BP makes its own base stock adn holds some of the patents. Part of what he did was dissect A40 and ask "why?".
I have input from a number of labs that I have shared. I cannto share the source. Note that some A40 oils had a darn hard time passing A40 and ACEA A3/B4.
Much of thsi note is good - to a point. But certain comments worry me - such as "so long as the higher number is 40 or above" - ignores the very important contribution of the SPREAD (e.g.: 40-5 = 35) to shear stability - the higher number otherwise falls over time folks. Actualyl its the ratio of the spread to the base number. On the street none of it really matters, to be honest.
etc.
I'll get to it.
Grant
Original Message
Author: grant Date: October 07, 2013 02:25PM Hoo boy - lots of good advice here - but also lots of "except that..."
I dont have timeo go through this line by line, but there are a bunch of subtle points being lost.
I kist had one of the lead formulation guys from BP lubricants (aka Castrol, BP) in to speak to NNJR-PCA. Note that BP makes its own base stock adn holds some of the patents.
I have input from a number of labs that I have shared. I cannto share the source.
Much of thsi note is good - to a point. But certain comments worry me - such as "so long as the higher number is 40 or above" - ignores the very important contribution of the SPREAD (e.g.: 40-5 = 35) to shear stability - the higher number otherwise falls over time folks. Actualyl its the ratio of the spread to the base number. On the street none of it really matters, to be honest.