Anyone know of upgrade parts for better MPG? i know the weight, tires and all that fun stuff helps but what about chips? intake? things like that. i don't trust most chips that i see that say "increase 60 HP and 8 MPG!".I know some chips work in some cars but don't work in others but i want to know for a fact the chip or whatever i buy will work. Currently i am getting 30 mpg with a trunk full of tools. so im guessing around 32 mpg other wise. What are good options? i have a stock 2011 Hybrid with brand new tires (typical tires, nothing special or specific about them)