I'm new he so if this has been rehashed many times I apologize!! I have heard or read that while breaking in the LS2 at hwy speeds, to keep it at 55mph... Is this true??? I ask this because I fly out to pick mine up in a couple of weeks and it's a 600 mile return trip on hwy with a posted speed limit of 75 mph the whole way! 55 could be a very long 600 miles! Any suggestions on breaking in my new GOAT will be greatly appriciated!!