Right after installing the AirDog on my 2005 Cat C15, I noticed the power difference compared to before, plus there was a gain of 0.5 mpg on my heavy loads and a full 1.0 mpg with lighter ones. My wife and I are really pleased with the AirDog as we waited a few months before buying it, but wished we would have bought it sooner. It just makes sense as it pays for itself in just a few months.
Hollis W.
Crump, TN
