Hi I just got my first car, a 98 suzuki esteem 1.6 manual. It already gets good mileage but i want to squeeze more out of it. I was wondering if there are any engine mods, such as cold air intake would help increase mileage, or re-programing the computer. I've also herd about adding acetone to the gas, which appearently gives you 15% better mileage, but im not sure if its going to damage my engine. One last thing I've seen is blocking the vents on the front of the car, does that give it better mileage?