See,
Bill has taken the trouble to clarify that perhaps he really doesn't know what the Mobil he's is talking about.
Bill, 'ol
"it isn't motorcycle oil" himself is saying a non JASO car based group III oil should be used in a Savage engine, especially an SN formulation with less than 600 ppm of ZDDP with moly added back in to it to try to take up some of the rapid wear slack.
No wonder he thinks we should all have rapid cam chain and flat tappet wear -- and slippy clutches too !!!
Now Bill, WHEN did you use this good Mobil 1 oil?
When counts in this question, as Mobil 1
before SM actually had some ZDDP in it and it didn't have moly in it either. Red cap Mobil 1 Extended SL formulation actually spec'd out to be good oil, but that was what, 5-6 years ago now.