I recently bought a mazda 3 gs 2019 in july. I have been driving the car in order to bring down the the average gas consumption. I was able to bring it all the way down to 6.4L/100km. However, there was a mazda recall for concerns regarding loose tire nuts, indicator unit for seat belt and rocker arm. I went to the dealer to have my vehicle inspected for the possible concerns. Thankfully my car didn't have any of the recall issues. Ever since this visit to the dealer my average gas consumption has been increasing, within 2 weeks it went from 6.4L/100km to 8.9L/100km. My driving habits have stayed the same and my route has stayed the same. I just do not understand why the consumption is constantly increasing with all the other factors staying constant. I make a 30km trip 5 days a week using highway to work and my speed stays approximately around 90kmph. I keep the acceleration indicator below the average point to bring down the consumption rate like I did before.
Has anyone encountered such an issue?Any advise would be greatly appreciated.