All the eco mods apply. After market wheels and tires can really hurt a hybrids mpg. With hondas when the engine and cvt approaches its end of service life you can see mpg suffer. Honda likes 0w20 synthentic oil. Some dealers use 5w20 or even over fill it. Weak starter battery can also cause low ima performance.
Was it a private sale or dealer? Maybe a good idea to disconnect the starter battery, wait 15 minutes, reconnect, let it idle for 15 minutes to learn your new habits and forgot the previous owners.
