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1) you answered it with your last sentence, that's what it does.
2) up to you
3) of you go easy, than none. if you have too much fun... u'll pay for it.... gas wise.
Changes throttle response, and gear change point - in other words, hangs onto each gear more, and slightly less lag on the throttle pedal.
Snow does the opposite for those with a lead (Pb) right foot.
highway driving is where you are going to get your best MPG anyway because you dont have a lot of stopping and going. you can get better gas mileage with the ECT button but just like any other MPG thread, it all depends on your driving habits.
Toyota and Lexus Join Mille Miglia For The First Time
Slideshow: A five-car lineup spanning more than five decades of Toyota performance and engineering will tackle one of Italy's most celebrated automotive routes.