well i towed the old race car down to the dirt track last night and had some 114 left over from the feature and said, hey, "screw stopping off for gas my truck will be able to run it" well i put it in with about 5 gallons left of regular 87 octane in it, and my power when towing the trailer was considerably different., it was a lot smoother, didnt notice any rough conditions at all. dont know what kind of difference it made without the trailer, but i should find that out tonight.