What are you using ?

What are you using for oil in your Race Car .Weight ? Synthetic? Regular oil ? I have a 360 pushing about 475 HP it a new engine with about 3 hours on it . I did not build the motor it was all ready in the car when I bought it . When hot right now its at 25 LB oil pressure at idle in gear 1000 rpm . But when going its at 50 lbs . I tried Royal Purple and was not impressed with it at 10 bucks a quart . Lucas seems pretty good idea . Or I usually run in all my cars 20/50/Castrol with 1 bottle of Lucus Oil Additive . Im just not sure with a new engine using a Synthetic .

Thanks Tommy