You need an apples to apples comparison. Many people claim to get higher MPG than the car's official ratings. You can't directly compare your own experience wit

You need an apples to apples comparison. Many people claim to get higher MPG than the car's official ratings. You can't directly compare your own experience with the standardised MPG testing. As you say, traffic and driving affect it. Maybe the car would get more than 42mpg with your driving conditions.