anybody used one of these any their MINI or any other car?

i've seen mixed reviews

 

What's this?

 

Read this web site.

http://www.fuelsaving.info/ecotek.htm

 

See the line that says...pre 1993 cars only....
And the line improved performane to the extent of removing 5 gas of gas from the tank.....insignafint...almost no change. Lot of effort and money for 1% or so, maybe causing unknown problems, etc. Slightly better than snake oil. A well engendered motor should do it already... The change IMO is from simply making the motor run leaner in some areas....so hotter....= more wear+stress=less potential longevity...IMO.
I did not study the report...but from the speed read that is my opinion.

 

All they seem to be is a controlled vacuum leak.If you have an old pile that runs too rich you might see some improvement but anything with an O2 sensor is going to try to adjust itself to maintain its target mixture.Pretend you installed it and drive more carefully and you will see the same mileage improvement.