CRX tune up NEED ADVICE

[mikesEK]

thanks yall..... i was talking to a dude i bumped into at the parts store and .... he was raving on how great seafoam is!! any of you guys ever use it?? ((if so, where and how..like crankcase? fuel?))
ive always used marvel mystery oil ((in fuel))because..........well ummmmm all the bow-tie guys i grew up with used it said it was the best thing since sliced bread.. idunno if it really cleans anything
but i run it generally when i change the oil ((again in the fuel))

i used to put MMO in the crankcase/oil ..... but a friend of mine who's worked on cars forever told me ""id NEVER run MMO in my block except to wash out the oil , run it 20/30 miles
before an oil change"" and went on to say it just thinned out the oil to much and more technical shit i didn't really understand......... whata you guys think?

SEAFOAM >>>>>>>>>>>>> http://www.seafoamsales.com/motor-treatment.html

MARVEL MYSTERY OIL >>>>> http://www.marvelmysteryoil.com/index.php/site/mmo/