Real World Fisker Range: 168 Mile Round Trip to Tahoe

I took my first longish trip yesterday. From around the South Land Park (Sacramento) to Sierra at Tahoe Ski Resort. Round trip was 168 miles. Temperature was about 50 on the way up, in the 70's on the way back. I started with an 83% charge. Arrived at %33, and was at 13% when home. I.e., I used 50% of total capacity (360) for 84 miles, then another 20% on the downhill return for a total of %70 of total capacity. 84 miles represents 23% of range at capacity so we should be looking at 46%. That's half the expected drain in real world use. That said, I did not drive slowly, around 70-80mph the whole way. I was in fun mode on the way up for a portion, then switched to earth mode as soon as my range anxiety took hold, maybe 50 miles into the trip, then back to fun on the way back when my range anxiety abated. I'm really hoping that the cold of winter doesn't harm the range much further as I'll make this drive nearly every cold weather weekend.