I am the original owner of the Honda Fit EX 2020 automatic. The vehicle is great fun to drive. However, I have noticed a reduction in MPG on my gasoline. I have 52,000. Maintenance oil changes every 3,000 miles I change the transmission fluid at 25,000 miles. What else can I do to see if it improves the gas milage?

 

If you have an OBD-II reader, look at fuel trim data. It's supposed to be basically 0%.
Air filter? Cheap & easy.
Maybe spark plugs, although they're supposed to last 100k.
Clean or replace MAF sensor if fuel trim is off.

 

Thanks will check

 

Do you live in a cold place? It's very normal for fuel economy to drop significantly in the winter months, especially on short trips.