Sea Foam SF16 Motor Treatment Automotive Additive, 16 oz

11/1/2025 As long the 16oz. bottle remains at the current price, unbeatable. More cost effective than the 20oz. I use it in an old RV. I got a check engine light for "left bank running lean" ? whatever that means. So I bought a buttload of this stuff, (75 gal. tank), cleaned the thottlebody with the SEAFOAM SS14 spray, replaced the MAP sensor and fuel filter. Ultimately I got the CE light to stay off (using a code reader from Harbor freight) and have been periodically running Seafoam ever since. Since the RV is only driven a couple thousand miles a year, the Seafoam also claims to be a fuel stabilizer while it is sitting between trips. I've considered using the MUCH CHEAPER SUPERTECH version, but my limited research tell me the SEAFOAM is probably safer.