I have went through and read the posts about seafoam but I have a question about using it. Right now I have only been driving my Expy about 5 miles a day (across town and back) and it is getting close to oil change time. What I want to know is if I put the seafoam in the oil will it hurt anything if I left it in there for the week? I wouldn't think it would (since the Expy isn't seeing much drive time lately) but I wanted to see what everyone thinks about it. I know seafoam is pretty powerful stuff and I don't want to damage anything. Any input would be appreciated.--Thanks!