Mobil 1 Gold Cap, 15W50

i throw in a bottle of comp cams break-in additive with mine. little pricy but i've been told it's cheap insurance for flat tappet cams

Whats everyone think of Royal Purple? I usually run Mobil 1, but it was suggested by my builder I switch to this.

I run royal purp racing blend. Put 100 hrs on the engines last summer. No problems thus far. Looks kinda weird...kinda purple. Alot of folks here on the Tickfaw run it.

Royal Puple 40 weight 502 Mag

Valvoline Racing 40W per engine builder. He won't warranty unless I run this oil. I change every 20 hrs.

Mobil 1 15-50.

Valvoline racing 40w

Penrite 15w-60 540/871 900hp

Mobil 1 V-Twin