Are there multiple lengths of engine oil dipstick for the Vortec 350? The one in my Burb ( which may or may not be the original, don't know since we got the truck used) shows way above full, when I have 5 1/2 quarts in it after an oil and filter change. I put about half a quart in the filter, so there's clean fresh oil going into the engine.
Had some valve train clatter upon startup the last few days, when it was cold and the Burb had been sitting a while. I put a little MMO in the oil, that shut it up after it warmed up. Stock 5.7 has 208K on it, doesn't seem to use any oil and doesn't smoke. So when it did the same thing yesterday, and the outside temperature was in the 70s, I thought maybe it was a little low on oil. Put half a pint in, with a few ounces of MMO, and it shut the noise up! Now it starts without any clattering, but the stick shows around 4" above the 4 holes indicating "full". Truck runs great.....but did I do a bad thing to it? The oil pressure ( per factory gauge) is good.