Acronyms used at BITOG.

Not in the list, and sometimes used in oil filter discussions:

BPV = Bypass Valve
 
How about ANs?
I get the sense that they are additives, but that is it.
I checked the updated list in post 157 and that isn't there.
 
If anyone is also interested in lots of oil & filter terminology in conjunction with the BITOG acronym list, Machinery Lubrication has a nice list.

 
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From HPL Dave: It is an abbreviation for Alkylated Napthylene. These are synthetic base stocks that have good high thermal stability and they also keep things very clean.
 
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