My buddy brought his truck over for an oilchange and to install a new GPS the other night so I was able to get a bit more info on his MPG upgrade chip.

It is a Predator model 1804?(i only got a quick glimpse of the model number) and he also uses a fuel treatment.

Howes Lubricator is the fuel conditioner used. It states "safe for use with ULSD fuels". We calculated his overall MPG is closer to 28MPG Imperial (23US). His hiway mileage is closer to 35(Imp) according to the overhead when he stays under 65mph.

Has anyone else tried a Predator chip or Howes Lubricator?