Burning oil-will seafoam help?
So I decided to make another thread about the oil control rings on my Z block. My L24 is burning oil, and goes through oil quickly, almost a quart after a day of spirited driving, and a quart after 4 days of regular driving. I know for sure that it isn't my head, because the whole thing is rebuilt with new valves, seats, seals, etc., all gaskets have been renewed with the exception of the rear main crankshaft seal. I know (or at least assume) that it isn't leaking oil past the rear seal, because I don't see any oil dripping past the transmission, and I don't feel any oil when I put my finger inside of the clutch fork hole. This leaves only the oil control rings left, which I believe to be the culprit, because the Z smokes bad upon acceleration. Two of my six plugs are oil fouled, they are covered in black crust, whereas the rest of the plugs are the nice golden brown color that will indicate a good fuel mixture. I've tried a quart of Lucas oil stabilizer to see if it would help, and the motor still ate oil after that. The motor has less than 500 after the new head swap, and the oil is black (still has the new viscous look, but is just black). One of the guys here on Zcar said that if it were the oil control rings, the pcv valve would be sucking the oil past the rings, so I could put a filter over the crankcase breather tube. I didn't want to tamper with the pcv system, but I did take the hose that connects the two off and put my finger inside of the crankcase vent, and there was oil on my finger.
My compression, with throttle closed, was 130-140 across the cylinders, and with throttle open was in the 150 range across all cylinders (mind you, the motor has no carbon on the head or cylinders, I cleaned my pistons and cylinders off when the head was out). I know the motor can still have good compression, but the oil control rings can still be stuck.
I bought a can of Seafoam to use on my truck, and I've got about 1/8 of a can left. I read on the side of the can that Seafoam can be used to free up sticky oil control rings, so I searched on this site to see if anyone has used it for this. I did read a post about pouring in a mixture of Seafoam and Liquid Wrench into the cylinders via the spark plug holes, letting it sit overnight, and then drive it to see if it frees the rings up.
Is this safe to do to my motor? I know Seafoam can be used in motor oil, but is it possible for it to really free up sticky oil control rings, or should I just go through with my lower end rebuild like I had planned?
'72 Datsun 240Z