Economical replacement rocker arm set?

nm9stheham said
Yes, you will be able to see the cam to some degree from underneath; you may need a mirror to see all the lobes, and the crank will have to be rotated a couple of times to see all the lobes.

So if you used Mobil 1 synthetic, then it does not have the ZDDP levels usually required. (Check out the chart linked...)

I can't find the exact ZDDP levels of the AMSOil Zrod 10-30, but all their literature indicates that it has adequate ZDDP lifters for flat tappet cams.

BTW, just for edification..... Mobil 1 IS petroleum oil. It is very highly refined petroleum oil; IIRC, it is refined to get highly consistent molecule sizes. That gives it its particular properties. So changing from Mobil 1 to a 'typical' dino oil is not changing TO a petroleum oil; you already have it.

I was using the Mobile 1 Synthetic just as a flush oil since ZRod is so expensive.

Update, I was warming up the car this morning to take it into the mechanic and decided that I would listen under the vehicle. The sound from down there is much more pronounced and very mechanical in nature. Also, you can tell that it doesn't keep a constant/specific rhythm as I imagine a lifter would at a constant RPM. Unfortunately, I wasn't thinking and didn't get a recording to share. I will see if I can swing by the mechanic to get a recording.