As stated by all above, it's close to useless as a gauge, really just an "active" idiot light.
But this now applies to All your gauges (with the exception of the Fuel Level). In an effort to limit unnecessary service concerns, by todays "average" owner (with little mechanical insight and the sense of entitlement for every service issue), they make everything look as it should by parking all the needles smack-dab in the middle (until something's gone Really wrong)
The sensor output readings are all now "interpreted" by the computer before being sent to the gauge. Keeps every Housewife & CPA comfortable.... It Sucks
Years ago, I bought a Kawasaki Ninja new (before I became a Harley guy
) and noticed as the summer approached it seemed to be running hotter on the gauge. I took it in and was told "Yea, there's a recall for that, we can fix it...
I dropped it off and when I drove it back home, saw the reading was staying much lower. Great! I thought, I wonder what they did... THEN, I found the resistor added to the sensor wire
Some fix - huh???
That's what it all come to, fix your impression to keep you happy.