I have a 2005 with TOR's, cat delete and triple K&N's and have close to 80,000kms on the beast and regularly get 300 kms per tank when touring (and having to keep the Polack's tail lights in sight so I don't get lost). Must be the traffic that is killing your gas mileage. I live less than an hour north of you. I only ever use 87 octane.