Please look at the pix by clicking on the links.  Let me know if there is any difficulty.  This technique may be faster than either incorporating the picture in the email or attaching it as a file.

 

Cyl 1 is the first to lean and is used to drive mixture settings such as 100F ROP.  These plugs have 50 hours on them and are Denso IK27's.  There are no deposits in the insulator area.  Some inserts came out with the plug.  I am burning a quart every 5.5 hours and generally keep the oil level between 5.5 and 7 quarts.

 

Duh, do ya think my oil problem is in cylinder #3?  Huh?