1. Is there a consensus on which is the best grade of fuel to use? 2. So the manual says the break-in period is 1000 miles, but it doesn't say what range of speeds are acceptable to drive it at. What are my elder Raptor owners' thoughts on that? I've been keeping it under 55 mph because that's what the break-in was like for my '09 M3. Thanks in advance y'all!