Best High Zinc Oil

Roger,
There are two VR1s - VR1 with the highest zink is the "Not For Street Use" stuff. It comes in a six-pac case and Car Quest (Ted) can get it for you from their warehouse. If the stuff on the shelf at Auto Zone or Advanced has the SAE "sunburst" logo, of a rating of SM or newer (is there an SN yet?) then it's NOT what you need. The Not For Street Use stuff will damage catalytic convertors - which is why it's called that. It's not legal if you have cats but you're car it's fine. I have my customers with radical flat tappets them run that because it's easy to get without paying shipping. Last time I bought it I got it for $6/qt but that was a while ago. I paid $5.60/qt for Castrol yesterday so it's probably gone up since then.