Hey guys, just seafoamed the car a couple of days ago. After normal highway driving, my oil pressure drops to 30psi. Before the seafoam, it would be 35-40 after getting off the highway. Is 30psi "acceptable"? I'm thinking maybe the seafoam did its job and cleaned out the inside of the engine, thus giving the engine just a little more bearing clearance. Is 30 ok, or should I run a thicker oil? BTW, the car has 116k on it.

 

GM says 10 psi per every 1000 rpms. 30 at idle is fine as long as it climbs with the rpms.

 

Yeah, the oil pressure rises just fine with the rpm's. Cool! No need to worry anymore.