Seafoam vs Berryman B-12 in my 2003 Ranger and one of them actually did something
I've got a 2003 Ranger with 187k on it that had a rough idle I could not figure out for a month. Tried a can of Seafoam in the tank first and honestly nothing changed, maybe a tiny bit smoother for a day. Then a guy at my shop told me to run Berryman B-12 through the intake and within 10 miles the idle smoothed right out, that stuff is no joke. Anyone else had way better luck with one over the other, or did I just get lucky with the timing?