Spark plug replacement

Frank <"frank "@frank.net> Mon, 26 Sep 2022 12:25:25 -0400
Newsgroups alt.autos.subaru
Organization A noiseless patient Spider
Message-ID <[email protected]>
Recommended at 60,000 miles but I read that my wife's 2008 Forester has 
iridium plugs and hear they can go over 80,000 miles.  Should I do it on 
her next service coming up?  Older we do not drive much or far.