My dilemma is this I have a stock 1994 Accord which I primarily use for highway driving. Lately my gas mileage has been somewhat low, just under 370 miles to the tank(no gas leaks). A friend told me that Hondas are notorious for poor gas usage. Is this true and either way how can I better my gas mileage. Not looking for extreme rewards just better mileage. Any help greatly appreciated.

Tire pressure= good
fuel filter= 5500 miles on it
spark plugs= bosch platinums
wires= accel
cap and rotor= oem(changed in november 03)
air filter(cleaned monthly)= k&n
oil= full synthetic castrol(changed between 3000-3500mile)
oil filter= fram