December of 2019, I purchased a 2007 Toyota Camry LE 4cyl AT 131,000 Miles at a Toyota Dealership.

I am only averaging 18 MPG (EPA combined is rated at 24 MPG. 21 City, 30 Highway) as I have always kept track of miles per tankful fill-ups to calculate MPG
I drive 85% City and 15% Highway as the average. Estimate rated should be 22.35 MPG

Took to the Toyota dealership month ago in regards to this issue, said they could not find the problem?

This had replaced my 2001 Toyota Camry LE 4cyl AT that had 200,000 miles with various issues.
Was averaging 21+ MPG.

Any input with suggestions why this is not getting the MPG it is rated at.
I am not a lead foot driver. Take very well care of my vehicles.