Hmmm, not sure where jetskibratttt got his information from, if he would have done more research he would have found that the fuel systems on cars are sealed systems. The only way you lose fuel is if the vapor has a way to escape. All fuel injected cars have a sealed fuel system. The new OBDII and OBDIII system put out a check engine light if you have a leak in the fuel system. As far as color I have both white and black neons. They both get the same gas mileage, so I doubt color has anything to do with it. Metal heats up at the same rate no mater what color the paint is. Anyway, on to the subject, the slower the acceleration the better you get mileage wise. The more you car stay moving the better as well. Look at the lights and see when you’re going to need to stop. Start to slow down before you get there and try not to stop. It takes more fuel to get moving then it does to keep a car moving. A lot of the stop lights in a lot of cities are set up to where if you are doing the speed limit you should rarely ever need to stop. Also keep in mind that if your going to be doing a lot of city driving and your speed is below 45 mph. it's best to turn your vent blower or AC off and roll down the windows. The reason why is if your blower is on the Alternator needs to work harder to power the blower. Turning it off helps save fuel on that front. Also having the AC off while in the city saves fuel too. Again the AC compressor makes the motor work harder to turn the AC compressor. While at highway speed roll the windows up and turn the AC and blower on to 2. Again you’re not forcing the engine to work harder turning the alternator when you have you blower cranked all the way up. On the subject of octane booster. All octane is, is an anti knock rating. Increasing the octane may give you better mileage because your motor no longer needing to richen or lean out the mixture do to a knock. So if you find that you do get better mileage with a booster then why not spend the extra 3 or 4 bucks for the booster per tank. It’s now cheaper then buying the higher octane. However most cars perform just fine with the 85 or 87 octane. Another thing to help keep your mileage up, keep a watchful eye on your air filter. In the summer time you have more pollution and dust floating around in the air. Most manufactures say to change the air filter every 30,000 miles. I find if I change mine every spring before summer, I keep my mileage up more often. A better air filter like the K&N performance filters also help. Offering more air in to the engine to give you that little extra boost of power can help out a lot when it comes to mileage. Make sure you keep your oil changed as well. Every 3000 miles, and changing the gear oil on your car will help as well. This needs to be changed every 30,000 miles so if you have never had it done, then get it taken care of. One other thing that will help you is to keep the out side of the car clean as well. Dirt does change the aerodynamics of the car and this will also create drag. Hope this helps.