[Dave at Pelican Parts]

The stock gauge doesn't have numbers on it, so it doesn't really matter if the senders are a bit different or not. You will simply have to get an idea of what the "normal" range is for your motor/sender/gauge combination, and then you worry if things get outside of that range.

Or you calibrate the gauge and sender with boiling water outside of the car--212F is a very good point to know on your oil temp gauge. (240F is another one, but you'll need to use something other than water to find that.)

--DD