4th tank of gas @ 5,927 km
In brief (updated): We’re now at 5,927 km (about 5,903 km driven since purchase). Gas-only, we’re averaging about 1.62 L/100 km so far. If we include estimated electricity using the car’s current reported 17.1 kWh/100 km and $0.185/kWh, total energy cost works out to about $4.50 per 100 km. Compared to our old 2016 Civic, that’s still roughly a 62% reduction in energy cost overall.
This post is an update to my earlier write-ups:
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March 23, 2026:
On March 23, 2026 we filled the tank:
- 17.4575 L
- $30.48 @ $1.744/L
- Odometer: 5,927 km
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Updated totals (Aug 9, 2025 → Mar 23, 2026)
Gas (measured at the pump)
- Distance tracked: ~5,903 km (from 24 km at purchase to 5,927 km)
- Total gas purchased: 95.52 L
- Gas-only average: 1.62 L/100 km
- Total gas spend (receipts): $141.66
- Gas-only cost: $2.40 per 100 km
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What changed?
The interesting part here is that this tank looks better than the previous winter stretch.
In my last update, the Nov 13 → Jan 30 segment came in at about 2.95 L/100 km. This new Jan 30 → Mar 23 segment worked out to about 1.89 L/100 km. So while winter clearly pushed gas usage higher than in the early months, this fill suggests things improved again — whether because of milder weather, trip patterns, less heating demand, or just more driving that better suited the battery. My earlier segments were ~1.69 L/100 km and ~0.92 L/100 km, so this still isn’t back to the best stretch — but it’s a definite step in the right direction.
One important note: the electricity estimate is now rougher than before, because my earlier posts used 13.1 kWh/100 km and I explicitly noted that winter had worsened efficiency. Applying the current 17.1 kWh/100 km across the whole ownership period likely makes the earlier warm-weather months look a bit worse than they really were. A change from 13.1 to 17.1 kWh/100 km is about a 30.5% increase in electricity used per distance.
Using the same framework from my earlier posts — 5,903 km tracked, 95.52 L total gas, $141.66 gas spend, electricity priced at $0.185/kWh, and the same estimated EV/gas split methodology — the updated estimate comes out to about 669 kWh of electricity, or $123.79 in electricity cost. That brings my estimated total energy spend to about $265.45, or about $4.50 per 100 km. In the same distance, the old Civic would be roughly $691.61 in fuel at the Prius comparison baseline, so the estimated savings are about $426, or roughly a 62% reduction.
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Summary:
- Total distance tracked: ~5,903 km
- Gas consumed: 95.52 L (1.62 L/100 km)
- Gas cost: $141.66
- Electricity estimate: 669 kWh ($123.79 @ $0.185/kWh)
- Total energy cost: $265.45 ($4.50 per 100 km)
- Latest segment (Jan 30 → Mar 23): 1.89 L/100 km
- Still dramatically below the old Civic’s 7.9 L/100 km
A useful next improvement would be to track the car’s displayed lifetime kWh/100 km at each fill, because that would tighten the electricity estimate a lot.