Best High Zinc Oil

73AbodEE said

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

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I break them in on 20w50. The thicker oil is able to suspend the fine metal particles better so the filter can get them out of the oil. I have been using it for years and the guy I work with on the dyno uses it on everything, even 2000hp Turbo BBC abd such. After break in we normally run 10w30.