Engine runnig hot?

[96mark8]

So today the temp outside was 79, the first time we hit the 70's this year i think in detriot area. i was driving the mark around and noticed it was running a little slow and hot. the temp guage was almost to the O when i was sitting at red lights and at the M or R when driving around. is this a normal temp for marks when its hot out? So how do i get it to stay cooler i was think a 160 Tstat? any ideas would be helpful!

 

[96mark8]

Anyone?

 

[slowmkviii]

my gen 2 always sits right in the middle
my gen 1 has always run cool from the time I bought it I think the previous owner put
a cooler t-stat in it