Thank you everyone for there input! Really impressed with this forum! I am leaning pretty strong to a 15w50-20w50 in either Mobil 1 or Amsoil. What would determine the need of 15w vs. 20w?
Just found out about this forum and was looking for some suggestions on WT and brand. I'm planning on racing at least (4) 200-450 mile races this year. With my new drivetrain setup and lack of experience having much more HP/inve$tment I really need some help with a good starting point to help...