We went up to a Ranch in BC recently and I discovered they have 94 octane premium available instead of our measly 92 Octane. Unfortunately I wasn't driving Fred (the 850), we were driving Wilma (my wife's 98 Grand Cherokee 5.9, Barney is the S-10 pickup). The Jeep has pinged relentlessly since new and it was soooo nice to drive it without visions of ventliated pistons.
Too bad I live a bit too far from the border. Not only for the 94 Octane but there are also some beautiful drives through the mountains in British Columbia.