Yes, another oil question. Figure to run it a short while then change the oil. Looking for some oil that's actually has the correct additives for my old flat tappet small block. Bought some 5 quart jugs of the Lucas 10w-40 Hot Rod oil that's supposed to be the real deal. But after a lot of study I read that it has 2100 ppm of the zinc additive. Heavy dose of phos. too. Seems like a lot, near what break in oil has. Is this too much of the additives? Anyone use this oil for any length of time? Doesn't seem to be any 10w-30 or 10w-40 oils that actually have the needed additives, even the so called racing oils. Getting ready to do some top end work on the Camaro. If I find some lifter wear while I'm in there I'll replace the cam and lifters, don't want to do this twice.