First off the prick is hard to see. Second, it will fall apart eventually and or read incorrectly. Thirdly, the oil temp follows coolant temp so the gauge is pointless. Mine lasted two years only until slop in the mechanism gave wrong readings. What I did was spray the stem with etching grey primer to make it visible. While I had the OEM for reference, the easiest way is to do a full oil change with filter and add the 5 quarts of oil. Run for 30 seconds and let it sit for 30 minutes. While on the stand, pull the dipstick and clean it so you can get a good reading. Mark the stem for the full mark and another 1/2" below that. This can be your on the stand, cold oil level check. If you are a purist and go by the book, hot upright can be done the same. To me, that process is nonsense. On the OEM dip stick, I found where the oil level was while on the stand, cold, and marked it.I have the temp gauge dipstick from the previous owner on my 2004. I dont have the factory plastic stick and cant seem to find any info as to how to read the correct oil level on the stick. There is two scribed lines maybe a half inch apart at the bottom and then a indentation maybe a inch and three quarters further up the stick. Does anyone know which one is the full line and which one is the add ?