I have a 08 c6 with 100k on it, just wondering if anyone has noticed this before dealing with ls based engines and oil systems.
lets see if I can explain this well enough.
so car has what I consider good oil pressure, I'm running the newer 5w40 oil, it's got what I consider good oil pressure, at 190 oil Temps 32 psi at 750rpm idle, and it goes up there there, I've not really logged it, but I've seen 50psi. the odd ball thing, and I've replaced the oil pressure sensor with a new oem gm one, is whatever oil pressure I'm at when I step in the gas, it will hold that or lose 2psi for a second or 2 and then start climbing with rpm, or if in let off, it jumps up too. it a manual, so rpm doesn't change on and off the throttle much. for example, cruising 55mph in 5th gear 45psi oil pressure, give it say 1/4 throttle, oil pressure will dip a psi or 2 kinda hold for a second and then build with rpm but when you let off, it will jump up a few psi oil pressure. in this example I'm only on throttle say 20sec, enough to gain maybe 500 rpm or so. it's almost like the oil pressure is effected by load, but it will blip down and then climb. I need to log a full throttle gear pull to see what max pressure hits, but just seems weird to see the oil pressure dip with the throttle like that. never noticed it on any other car, and wasn't looking for it on this one till one day i just happened to notice.
the car is pretty stock, no internal work or cam, I've done a oil pan gasket because it was doing the ls seep in the corners and at a different time the balancer, because they all wobble around 80k it seems haha. I didn't touch any oil pump, or the pickup o ring which looking back, I really should have done while in there. but pan was spotless, no sludge or anything,, I've done one track day with the car 2 years ago(could have been doing it then and I just didn't notice) , sent off an oil sample to black stone for that day and all came back good.
just seems odd haha. motor sounds fine. I've seen on the trucks there's a oil port side of the block by the pump I guess with the right fittings you can put a manual gauge on. you think that's worth doing?