You might want to do some reading on this site.<br /> http://www.seafoamsales.com/motorTuneUpConsumer.htm <br />It is OK in the oil, but that isn't likely to be where your problem is.<br />I would sure try it. It has worked for me when I forgot to put fuel stabilizer in the gas in a motorcycle. It took a couple of tankfuls, but it did work. IMO, great stuff.<br />BTW, it also works as an offseason gas stabilizer.Originally posted by Todd Brown:<br /> My Bayliner is not running well and running after I shut it off. I have bought some Seafoam and would like to know the best way to run it through the system ie. fuel tank or put it in the crank case or through the carb. Thanks!!