i use this spray on engine detailer/sealer. a can last about 1 year and cost $6 I think. I can not think of the name of it. if i can remember, i will look when i get home.



Here it is, CD-2 engine detailer. it works great and lasts a long time when you spray it on.

http://www.autozone.com/selectedZip,.../selectZip.htm