Lifters and Oiling

Was it just a bad lifter or did the cam eat it? Sometimes it is just a bad lifter and can be replaced. When I break in I use the recommended additive and drain and strain the oil through a old T shirt right after the break in, within 100 miles sometimes even sooner, if it was a complete rebuild lots of metal go's into the oil. I do this when the oil is still hot so it is fast draining to bring any metal out with it, also it strains better that way. I also want it back in so the additive is still lubricating the parts for at least another 500 to 700 miles. Then I get rid of it and put good quality oil in with a new filter and will change it again in a 1000 miles. By then everything should be well broke in and ready to go full term. I just don't take chances. As for mixing oil, that is basically what multigrade oil is. Back in the day before multigrades came out I mixed grades. I had a 340 Swinger with the hot running 340 with J heads and man it would burn 30 weight like it was water. I would use three 40's and two 50's and it would have better oil pressure as well as quit burning oil like it was water, and it helped cool things down too. Keep in mind these engines were made to run on straight weight oil. Any hoo what did things look like when you got the intake off?