Welcome aboard wh013mi1k! Yep those @&%$# mudflaps are way too low. Alot of guys here either take them off or trim and inch or two for more clearance. As far as your mpg i was wondering...between your test trips is there much elevation difference?
BUT, for arguments sake the elevation of RI is 200ft+ and the elevation of Vienna, VA is 358ft+. If the Tacoma is impacted by that small of a delta then I chose the wrong truck to purchase....