Best High Zinc Oil

MRL Performance said

I did, VR1. I break all my engines on it before we go full synthetic. Its good stuff and is tops in my book. I have used a lot of different oils, special break-in oils and all the hype. Good ol VR1 has never let me, or a lot of the guys I know running it, down.

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what weight do you use? do you fill it up with the VR1 or do you mix it with conventional 30? i am about to break in a 440 and i was told to use one quart of comp cams break in with 4 quarts of regular 30. what do you recommend. im looking to get something of the shelf if possible