Kyle Belcher
GBI have not noticed any difference in… I have not noticed any difference in fuel mileage, but I do believe the car runs better.
Tracy Thomas
GBI didn’t receive the order at first so… I didn’t receive the order at first so I reached out to the customer service team and they were amazing at getting a replacement sent out and even stayed in contact with to confirm that I received it. I was extremely happy and impressed with the way they handled my situation.
tom klein
GBHonestly it's not made a difference… Honestly it's not made a difference city or highway drivng. I'm on my third full tank starting out at 17.2 highway in my 2021 Yukon Denali. City I dropped to 16.4 which is normal. I made two 300 mile trips to Pa on two full tanks and I remained at 16.4 mpg. So not sure If I'm doing something wrong but it's not working...TK
Brandon Shumate
GBProduct no show, no response I ordered over a month ago and haven't received anything yet. I've tried to contact customer service twice and no response
Brian Wilson
GBQuick (and unanticipated) results Quick (and unanticipated) results. Only issue: first pkg came with 2 broken tablets. Extra bubble wrap may be adviseable.