Frustration! What’s the deal w/ the socket size for the 2018 Outback drain plug? 14mm is too big. 13mm is too small. Has Subaru decided to make us buy a special tool for changing our own oil??? Thanks. 

Edited April 27, 20196 yr by McIntyrepm

there is no 13.5, and Subaru doesn't use US standard stuff.

So, it will be a 14mm.  

Get a good six point box end or socket.  Do not try with an open end or a 12 point.