[JohnWmZick]

I use ARCHOIL 9100 AND 6200, in my '06 Silverado and it starts faster, runs cooler, and my mileage went from 10.0 in the city to 13.33, and on the highway went from, 13.4 to 17.56! Whats wrong with that???
John Zick
Vero Beach, FL