how acurate is the temp gauge on Hondas?
is there any reason to upgrade the gauge?

 

Although mine has always been consistent, I think the consensus is that it isn't very accurate. I've ended up with quite a bit of coolant in the overflow and I don't think it ever went above the warm-idle mark.
So, it would be cool to get a new one, but it's not top on my list. I've got boost, egt and a/f and if I get another it'll be oil pressure...then if I get another it'll be cylinder head temps. maybe after that another coolant temp sensor near the rad.