transamz9 wrote:
These people guarantee 20% mileage increase with 120 day money back guarantee. It is not a chip or programmer.
duramileagemodules.com
If that is not a chip or programmer, what is it? According to the video, the guy says it is "warranty safe" because the vehicles computer will not "know" that the thingamagig is installed - I find that hard to believe. Of course, no where is it said that it is "warranty allowed". Interesting and very careful use of words.
That thing might work, but along with most others here I wouldn't put it on an engine that is still under factory warranty.