Hello, I have a '97 Camaro SS and have a question about my oil pressure, when I fire up the car the oil pressure reads about 70 psi and when under load it reads above 40 psi about 42/43. Now at idle or sitting at a light it drops to above 20 psi and fluctuates up and down between 20 and 30, when I accelerate it's holding steady above 40 psi constantly with no drop, it only drops at idle. Is this something to worry about? I'm using Amsoil Zrod 10w-30. Thanks for your time and efforts towards this question.

 

That's pretty normal operation and pressures look fine. Pressure is higher when the engine is cold and oil is thicker.

 

Thanks shoebox!

 

Does Amsoil Zrod include a ZDDP additive? If so, no need for that with your LT1's roller cam.