Let's start a thread here...

Right now, I am thinking of ways to improve fuel economic figures on cars... They say change this and change that, have a tune-up... So what do you think? I've heard here before, it was way back 2006 and tsikoteers have this topic about Revo's that guzzle gas a lot... One owner said changing the muffler to bigger ones gave him additional 2km/l on his mileage! Does anybody has a proof? Please enlighten me about this...

Can you help our gas guzzlers change their appetite because we would like to save more gas for your personal use.

So what mods can you share to improve fuel efficiency?

TIA!