Getting close to firing my engine with the fresh flat tappet cam and Howard's says to fill the engine with light oil 5-20 or 10-30 non-synthetic oil for break-in. They also want you to use their ZPM break-in lube as well. I have broke-in a few cams in my life but their procedure is new to me. They suggest run it at 2500 for 10 minutes then let it cool down then run it again for another 10 minutes.
I've never used a Howard's cam before, just Comp,Crane, and purple cams. They don't say to remove the inner springs but I always have with solids so I'm going to break-in with just the outer springs.
I'm just guessing here but maybe there is more splash on the cam with a lighter oil I have EDM lifters and my springs are 145 on the seat and 350 on the nose.
Any thoughts on this procedure? I have never marked my lifters to see if they turn with the cam but I will this time I will while I'm lashing the valves. I usually just make sure they spin when I drop them in the bores.

Gus