We took our first long road trip with the Clarity last weekend, San Diego to Las Vegas and back. The car ran great other than up the steep mountain passes, where I got angry bees and high RPM's for long periods of time, about 8-15 miles continuously. I had an OBDLink MX dongle connected, and it was registering RPM's in the 4500-5200 range during the climbs. It was pretty disconcerting to hear the car rev that high for periods of 10 minutes or more continuously, it sounded like we were stuck in 1st gear the whole time. I was in HV Sport mode, and battery SOC was around 80% at the start of each climb, dipping to about 65% at the lowest. Speeds were high however to keep up with the heavy traffic flow and short spacing between vehicles, usually 75-85mph (anyone that's driven the I-15 corridor going to Vegas knows what I'm talking about). Is it normal for the car to rev that high for that long under those conditions? Should I have maybe used HV Charge instead? The car seemed to have plenty of power available during the climbs (the power gauge never went higher than the 5th mark or into the solid white section), and I never had to floor the pedal or go past the click, but I was also afraid to try that because the engine sounded so mad already, I didn't know what would happen if I floored it. Any thoughts? It just seemed like the car really didn't like those grades, despite having plenty of speed and power. The Clarity (and hybrids in general) are new to me, so I don't know if this is normal behavior, or if the engine is designed to run like this.