Well, in short, it looks like the VR 10W30 is similar to a break in oil. Conventional base with high zinc/moly/phos numbers and lower detergent. It gets good ratings on the wear charts everybody likes to bandy about when discussing oils. And 10W30 will flow easily and is a good baseline to judge cold and hot oil pressures on a new engine. I could run synthetic after break in, but Total Seal said the AP rings would benefit from using high zinc hotrod style oil after they seat. HR lifters DGAF about high zinc if RPM and/or spring pressures aren't excessive.
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I could explain all this to the girl at the parts store, but she'd probably call the asylum.
White '67 LeMans 407/TH350/Ford 3.89... RIP
Red '67 LeMans. 407/TH400/Ford 3.25
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