Decided to be an idiot and get some backwoods fuel at a Quik Fill along the highway. Figured it wasn't TOO bad being along the highway but sure enough topped off with a full tank of 93 when my dash read 11 miles til empty. 100 miles later I put it down today to pass someone on the way home from work and OAR dropped from -1 to -.84 instantly and ignition corrections showed -3.79 to -3.74 on all cylinders. Limp mode it is for this week. Sigh.