I installed a Autometer Mechanical Water Temp gauge (Degrees Fahrenheit) and took some photos comparing to the stock temp gauge. I searched forever to find some info on what temperature each bar is on the stock gauge and could not find anything so here is some pics showing each bar and what it relates to in Fahrenheit i have converted to Celsius below: Note: This is on a N/A rb30 Automatic completely stock no mods low kilometer engine. 170F = 76C 175F = 79C 180F = 82C 190F = 87C With A/C on a hot day in traffic 200F = 93C Some original photos have not been recovered yet.