Why is the MPG on my Toyota Corolla decreasing?

I've owned my Toyota Corolla for a few years now and I've noticed that the MPG has been decreasing over time. What could be causing this and what can I do to improve it?

Firstly, make sure you're properly maintaining your Corolla. This includes regular oil changes, tire rotations, and air filter replacements. These simple maintenance tasks can significantly improve your MPG.

Check your tire pressure regularly. Under-inflated tires can decrease your MPG by up to 0.3 gallons per 100 miles. Keeping your tires at the recommended pressure will help improve your fuel efficiency.

Avoid idling for extended periods of time. This can waste a significant amount of gas. If you're waiting in your car, consider turning off the engine to save fuel.