Re: Sea Foam prior to oil change?
"IF" there is gunk and crud in the engine, snake oil such as sea foam, Rislone, or any other detergent like additives are likely to break it loose. HOWEVER, breaking it loose is not necessarily a good thing. Synthetic oils may do the same thing, again sometimes it is better to leave the gunk alone rather than break it up and disturb it. I have seen numerous engines that have had a cleaning treatment with various products and they later lost oil pressure and eventually spun a bearing requiring a major overhaul. (Read as large outlay of $) The gunk that was dislodged was eventually caught in the oil pump pick up screen and plugged it up cutting off the oil supply to the oil pump. If you want to use a detergent additive, snake oil, or synthetic oil do it on a relative new engine to prevent build up, but never switch to synthetic, or use high detergent additives on an engine that may be old enough to have a good buildup of "crud" inside.
Just my .02$ (worth what you paid for it :^)
Dwight
