seafoam is a great maintance product. i’ve been using it on my maxima for over a year with no problems. i pour it in the crankcase, gas tank, vacuum line
ok it seems like everyone agrees not to change the fluid after this muc time, but why not? is there a specific reason on why it is best to leave it alone?
anti-freeze is anti-freeze man. there is no “special” one. there are different ones, yes, but your mazda will not over-heat if you use a different kind. mixing coolants is different though.