This may or may not be the best lap of the day. GPS coming out of the GoPro was sketchy at best and unreliable at worst, so I can't go off of that. The lap timer on the phone occasionally didn't trip at the S/F line either. And I don't have any info from the first session because of the GoPro flakiness and my forgetting to start the lap timer at the start of the session. So we got what we got, my personal best lap and I'm fairly confident that it's a valid time. 2010 Mazda MX-5 on very used Yokohama AO52 tires.