“I added one bottle of Force1 Engine Treatment in my old 4.3 liters 1989 GMC Safari with 350 thousand kilometers a day before an emission test. It passed flying colors only 19 HC ppm on the 40 km/h and 15 HC ppm on CURB IDLE the CO% was 0 and 0.01 on CURB IDLE the NO ppm was only 133 over 948 limit. I have never seen such a thing in my life being in the automotive repairing industry on a vehicle like this. Check emission report. I do use the product on all my personal vehicles and customers of mine.”
