I bought a new boat in December of 2021, came equipped with a 496 MAG HO Chevy V8 with around 300 hours on it. Being I purchased during the cold season, it sat over winter and upon starting it up on the hose in spring I noticed it was idling rough and almost hesitating a bit. I've been a Seafoam user for years and swear by it, so I decided to buy these highly concentrated bottles instead as the boat tank is 100 gallons. I put 4 bottles in on my first trip out to the lake and after running it for a while I noticed a drastic improvement in idle and it was significantly smoother throughout the RPMs. I add more at each fill up to keep the fuel system clean and the fuel stabilized. Can't recommend Seafoam products enough!
Rating:
[5 of 5 Stars!]