I知 currently using autometer oil pressure gages to be specific the one that goes up to 100psi and my car is a sentra that never goes to further than 70 on race conditions well when I started the car in the morning the gage indicator went all the way around passing the 100 line and well then we thought that the gage was broken and when we went out to the practice session the oil filter came loose and spilled about 3 quarts on the racetrack and I知 not going to give details on the black flags and skating session that took place afterwards but we got another oil pressure gage from my good sponsor and guess what the brand new oil pressure gage went all the way around too! Then my friend told me that it was because I changed from mobil 1 15w50 to Red Line 40w and I don稚 think it was because of that what I think is that the line is obstructed because there is no way a car will run 45 minutes of racing in 150 psi I will like to know if some of you guys have gone trough this before.