Any mods that enhance MPG AND power?

[Astroman]

Originally Posted by grampi

I'm assuming you guys are kidding about the performance chip, right?

Yes, I was kidding. DON'T get it! The best ways to gain performance while maintaining/increasing MPG are:
Tire pressure maintained
Clean air filter, whether cold air intake or drop in type
Light wheels (most plus-sized wheels are heavy. Always check the weight)
Lightened pulleys (So far NST has the lightest, and only the crank pulley is out so far)
Free(r) flowing exhaust. I went with TRD, isn't super loud either, no fart-can here
lose any extra weight
avoid ebay gimicks promising huge power gains and mpg gains
shark fin antenna. (Hatchback only) That long antenna sure isn't helping wind resistance.
Keep the car clean and waxed
Keep your eyes open on the road ahead. Planning manuvers can help you time stoplights, merge with traffic and what not.
I switched to 5w-20 synthetic oil and noticed a difference after the stupid dealer put in 10w-30 dinosaur oil in there. More performance and HUGE increase in MPG. I wouldn't recommend 10w-30 at all. You can put it in there, but that heavy of oil isn't needed. There's my 2 cents for now.