As a point of interest to any one that cares I have an 07 FLHTC with 10:1 compression, re-worked heads by V Twin Specialties, SE 255 cams with Thundermax and Autotune. In the hinterlands of Northern Alberta and British Columbia I've had, with much trepidation, been forced to gas up on a few occasions with 87 octane, topping up a half full tank of higher octane, and experienced no adverse effects or detonation. I only do it out of neccesity and it has worked so far. |