I'm an old member of this site, so I'm not pushing any product. But having used FP in my 2002 F-150 4.6L and 1996 Ford Contour 2.0L and stopped using it for around 2 years I really noticed the difference. I recently began reusing FP again and after maybe 5 fill-ups with both vehicles they run much smoother. The first 2 tanks I used probably had 2X the dosage of FP. Where as my F-150 would run like poo in the summer it now runs ok with the FP in the summer. My Contour would buck slightly without FP at light throttle. But with FP It's smooth at light throttle. I can't explain it but FP seems to work for my circumstances.
Whimsey
Whimsey
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