Liquid (comp cam) break in additive with high Zinc

i cannot decide what oil to run. I was wanting to go synthetic VR1 but when i was going to buy a case i noticed there are two different VR1's one is regular
http://www.amazon.com/Valvoline-VV211-F ... B000CCIFQM

and this is the synthetic
http://www.amazon.com/gp/product/B000GA ... Y6J2V9AE98

but the "Not street legal" says it has lower detergent levels does that mean its not good for anything but a pure track car that has its oil changed every race?

any way i'm stumped some one teach me the way! lol

I was running the Brad Penn green stuff but I got tired of having to order my oil online and the shit is kind of expensive. I've been running the good old non synthetic VR1 for my past 2 oil changes.

the 20w50 in the link i posted right? hows your oil pressure and change interval?

That's the one, yes. Oil pressure is the same as it was with the bradd penn shit. It will idle around 90psi when cold, but it drops to around 25-30psi once it's hot at around 800-850rpm in drive. I probably change it once a month or month and a half.

Cool. About how many miles do you put on a month? I'm gonna do some of those oil analysis this for the hell of it. I have a sample now that i have been meaning to send in lol

Not sure.. but not a whole lot of miles because I don't drive it nearly as much as I used to.