Fuel Saving Devices

I see tons of advertisements on the Internet for gas saving / devices increasing mpg. Are there any devices that really work? Has anyone used a device that has increased their mpg?

Proper maintenance and tire make a big difference. Other items may make a marginal difference, but only if two conditions that I listed first are met. Seriously, under-inflated tires drop to about 5% of your fuel consumption.

Yes, its called walking.

They are all a scam, especially those who say "installs in five minutes" or "no change needed"

If you live in Canada, you can go to Canadian Tire, they sell a pill that you put in the gas tank. It gives the car a cleaner running fuel efficiency of the car is better. You get better gas mileage. In a way it cleans the carberator, lines and all other things will be clean. Besides all these things that your car works better.
The pills cost about $ 20 - $ 25 for about 18 tablets. you must have a half tank of gasoline or more before puttin the tablet, then drive to the gas station to fill - ER - up. You'll see better gas mileage. Sorry do not remember the name of the little blue pill.
It does not work. Good Luck

Fuel Saver
it is liquid platinum that sucks in air intake
My Power 66 GTO sorting is increased from 8 to 12 mpg with it without
also retains the carbon formation

Sure. Do not drive.

1. Speed limit
2. Avoid rapid acceleration
3. Keep your vehicle in good working condition
4. Do not ride the brake
5. Drive smoothly
6. Change lanes slowly
7. Never jerk the steering wheel

Yes, it is called a tornado that is put in the line of the air filter plenum draws more air for better fuel economy and power