Why is the fuel efficiency of my BMW 3 Series decreasing?

I have noticed that my BMW 3 Series' fuel efficiency has been decreasing over the past few months. I used to get around 30 mpg, but now I am only getting around 25 mpg. What could be causing this decrease in fuel efficiency?

Hi Samantha, there could be a few reasons for this decrease in fuel efficiency. Have you been keeping up with regular maintenance and tune-ups? Sometimes a dirty air filter or spark plugs can greatly affect fuel efficiency. Also, have you been using a different type of fuel? A lower quality fuel can also impact your mpg. I would recommend bringing your car to a trusted mechanic to diagnose the issue.

Hi Samantha, another possibility could be that your tires are not properly inflated. Under-inflated tires can cause your car to work harder, leading to lower fuel efficiency. Make sure to regularly check your tire pressure and fill them to the recommended level.

Hi Samantha, have you been using your air conditioning more often lately? Using the AC can decrease fuel efficiency, so try to use it sparingly. You can also try using the car's ventilation system without the AC to save on fuel.