I\'ve read and researched about seafoam and it\'s seems like the best thing i can do instead of going to pepboys 2 get my engine flushed/clean. only problem is I understand how much and where im putting it (crankcase,fpr,and gas) is the all or are there ne other spots I\'m missing? i own a 1990 honda civic si(hatch). thanks also i was planning on doing a oil change change cuz i\'m planning on going 2 the beach . should i do that same day or wait( its a 180 mile drive), and how many mile\'s afta i install the seafoam. thanks