Itza46,

The P-115 AC filter element is used in the AC type S-6 oil filter. This filter was sold by GM from 1955 to 1962 but could be found on many earlier engines.

NAPA 1100

AC P115/127 LEE L51
DELUXE WD37
FRAM C21/C21P/CH105PL
HASTINGS LF101/207
MOPAR 921178
MOTORCRAFT FL333
PUROLATOR P51/P125 (now L20051 ?)
WILLYS 119952
G.M.C. 5572288
TEXACO T5

WIX FILTER # WX51121 might be the same.

You might want to check an earlier discussion on this topic: http://www.stovebolt.com/bboard/cgi-bin//ultimatebb.cgi?ubb=get_topic;f=2;t=004448#000002

Tim