any trick to boost fuel economy

if your tires make road noise its eating 3 mpg [roll resistance] big time, everything you did is right, the cap,easy peddle,ect, maby 5 extra pounds in tires,and another big factor is and i mean big is brand of fuel, my tundra varies from 15 to 17-1/2 by brand

change the spark plugs , oil , add a K&N air intake , a new exhaust system , and If you want more add a bully dog system. All this will add more fuel economy and extra horse power.