Hi, at 60 mph oil temp. 188f. my oil pressure fluctuating from 68psi — 79psi at idle 47psi–58psi. Took it in for oil change the GEN 5 Viper tech said he checked it out AND he said that’s normal. Car has 508 miles on it. It just started doing this at 436 miles. I found on the VOA site there was a RRT (which I couldn’t open) addressing flex. oil pressure But it showed a date 2013 & 2014 mine is a 2017 GTS-R. I don’t think the flex. oil pressure is normal. I was hoping he would replace the sensor he said no because there is nothing wrong. Any thoughts or opinion’s would be appreciated.
Response by Dan Lesser:
There is more going on here than meets the eye, or omitted information we may need.
Are you comparing thoroughly hot and heat soaked oil temps and pressures? Oil pressure is a variable value based on oil viscosity, RPM, oil temp, load, etc. Please clarify if the needle is bouncing during a steady state condition [Not Normal], or are you noticing a pressure deviation while actually driving around [Likely Normal]?
Need more info.
Response by Dan Cragin:
Oil pressure will change as the engine heats up, its function of the oil’s viscosity changing with temperature. Typically oil pressure will read higher when cold and lower when warm. At a constant engine speed or at idle, the oil pressure should not fluctuate as you describe, unless the engine is low on oil. I have seen several oil pressure sensors give low or erratic readings on the Gen 5 Vipers. After replacing the sensor this was corrected.
