I am seeking opinions on Driven brand motor oil for use in our hotrod LSx motors. I had never even heard of this oil until I sent a set of 243 heads to Texas speed for their stage 3 magic. And after talking with my machinist friend there he highly recommended that I use Driven BR 40 for my break in oil. He stated that they so highly believe in the Driven oils that if you buy a complete motor from them that you must prove that you were using Driven to make a warranty claim. Seeking opinions please.