Originally Posted by RadioFlyer

.2 points isn't *that* much leaner. If you have problems, you should have been closer to 12.5 in the first place. But if you want an extra margin of safety for your track day, raise your octane. Use a half tank of race gas. I usually run race gas at track days for safety anyway. I fill up, then drive the 1.5 hrs to the track and top off at the track with the unleaded race gas. Then top off with race gas after each session. This is assuming you're doing a circuit-track track day, not a dragstrip track day.

Originally Posted by solidus

Another quick option is to have your car e-tuned to get it into spec. The time it'll take is dependent on how quickly you can get your 0-60 logs emailed to the tuner and him to get them back to you. Works great for adding mods in between finishing touches on a dyno. Based on the tuners skill I've seen where e-tuned vehicles performed better than dyno tuned vehicles mod for mod in a quarter mile setting. I just always appreciated the ability to send logs to check my state of tune and make adjustments after adding bolt-ons or minor mods.