Has anyone used this product?..if so does it improve fuel economy.or performance?..or shall I stay away from it.

 

i heard it wasnt worth it

 

I PUT IT IN MY MOWER SEEN IT WORK(MOTOR JUMPING & SHAKING)STARTED PURRING LIKE A KITTEN IN LESS THAN A MINUTE(MOTOR SMOOTHED OUT)WHAT THE HECK 25.00 AT tARGET .I RUN IT IN BOTH MY NISSAN AUTOS MAX AND PATHFINDER.

 

Dang! My mower sputters and shakes too! ...maybe I'll try it!