I have a 2001 Suzuki Swift with 180K miles that gets 40 mpg and now 48 mpg. It use to burn one qt of oil every 100-300 mile and now every 4500-5000.
My girlfriend has a 2005 Toyota Sienna with 130K miles that get 115 miles more per tank.
My girlfriend daughter has a 2006 Toyota Corolla with 130K miles that gets 26 mpg and now 40-42 mpg. I forgot to mention that all 3 vehicle runs smoother, quiet and more power.
I have 2000 Toyota Echo 180K that was getting just little over 30mpg and now I get 45mpg 80% city 20% Hiway with treated motor, 5sp trans, steering, TB mod, magnets and NGK Ruthenium HX with a 20% bigger gap. I get 496 miles per tank.
I forgot to mention about AC additive results on my 2015 Yaris it run 10 degree colder, 2005 Sienna 14 degree colder and 2006 Prius 6 degree colder and 1-2 mpg gain.
Awesome 👏 👏 👏