TADGER the fuel saving device does NOT work, according to CBC News
 

Here are some info on Tadger:

CBC Result:

Of course it doesn't work, none of these snake oil kits have ever worked.

Some things do work and mostly for free (except 5):
1. Go easy on the gas and or hyper mile, plan your driving by paying attention 1 or 2 km ahead of you and react accordingly, the key is slow down but not to a dead stop.
2. Check your tire pressure
3. Loose some vehicle weight or driver's / passengers weight
4. Remove all the stupid down force devices that never makes a difference in real life anyways
5. Get a Tesla, i8 or i3

Ppl need to be told that shit like this doesn't work?

i have the eletric fan turbo, this cig device i shove in my cig lighter and this echip computer on my car :)
im virtually running my car for free now.

Your fuel consumption must be into the negatives, how do you keep the tank from overflowing?