yesterday during the down time (on track running my Spec Miata), took my Prius out for 1 session. Track - Street of Willow CCW lap time - 1:45.6x (fastest Spec Miata can do it in 1:28). MPG - 15mpg tire pressure - 36 / 48 cold, roughly 41 / 53 hot. Bridgestone Eco**** tire didn't chunk balance - surprisingly good. little understeer. car will tuck in with a throttle lift. may be it is because the tire pressure trick. brakes - again surprisingly good, better than many so called performance sedan. A little too much initial bite. braking deep wasn't a problem. stock pads held up find. weight - ran with full weight, including spare tires and tools. plus a passenger. It doesn't roll as much as thought, guess may be because battery is down low ? Did just a few laps. confident it will do a sub 1:40 with good tires, minus passenger, spare tires, tools. If only I can turn off VSC, and find a way to charge up the battery. again, very surprised with its handling and braking. VSC kicked in and beeps every corner. a bit annoying. hopefully I set a record for lowest MPG !!!