A friend installed this gizmo in my truck two months ago. After 30 seconds first start I noticed that the engine becume soooo quiet. At first I thought the RPM went down because of the water, but no, the device has definitely changed the way my engine works - it does not ping anymore!

Another thing I noticed right away was that the absolutely terrible stink previously coming out of my exhaust has gone down dramatically. Man it was choking me -I can breath again!

Drove it home, engine roars +feels like much bigger engine! After 5-6 miles I kinda went into a "smooth bubble", like the engine suddenly becume smooth as butter. Was a very hot day so I figured it might be the weather. I was wrong!! The car continued to run smooth in ANY weather, and kept improving all the time day after day, week after week.

It's now so quiet that FOR THE FIRST TIME now I can listen to the radio at low volume or talk on the cellphone without shouting!

On road tests I got "only" +13% improvement on MPG, but the company gave me a solution to improve that to at least 25% with small modification.

When the truck broke down I automatically blamed the new gizmo. Wrong again! It was a leaking radiator which I fixed for $1.99 using Aluma-Seal. Now I know THE GIZMO ONLY IMPROVES MY CAR all this time. And with so much less engine vibration and no valve/piston knocking, I expect the life of my engine to double!

What I DONT LIKE now is when I open the truck window and all these OTHER cars are so noisy and stinking!!! Everybody should have this technology! I'm tired of this...well its like second hand smoking... you can call it second hand smogging LOL

E.S. (California, USA)