2005 Cat C15
Approximately 5 minutes after installation, I noticed a major difference with the engine and how smooth it now runs. The engine has never operated this good since I’ve owned the truck. I also shift less, indicating increased torque. The first full tank was .6-.7 mpg gain, the second tank was .9 mpg gain, and the 3rd tank was .2-.3 mpg gain. The first two tanks were consistent driving conditions and the third tank was at higher cruising speeds. I am ecstatic with the results and cannot stop telling everyone how great the product is. I was initially skeptical, but now am a believer and think the next few tanks will be +1 mpg gain.
Ivan
