Is 28mpg highway mileage for 2000 Camry reasonable?

4 cylinder CE. I don’t know what the official specs were for this car but I measured 415 miles between gas tank fills; last fill was 14.81 gallons. probably 3/4 of this was highway. has new sparkplugs and injectors, timing belt, tuneup in 2008 etc. I’d project that pure highway would be 28-32mpg. I guess that’s not bad for a 10 year old car.

That’s exactly what you should get. EPA highway with a manual is 29 MPG and with auto it’s 28 MPG.