**BYD Sealion 6** · *4 fill-ups tracked* · Dec 2025 – Mar 2026

> **Disclaimer:** Efficiency figures, cost calculations, and usage splits are derived from odometer and meter readings you provide. Accuracy depends on the accuracy of those inputs. Values are for personal tracking purposes and should not be used for warranty claims, tax filings, or official reporting without independent verification.
>
> Generated by PHEV Tracker: https://github.com/marfillaster/phev-tracker

## Last Refuel

| | Distance | Fuel/Energy | Efficiency | Cost | Cost/km |
|---|---:|---:|---:|---:|---:|
| HEV | 299 km | 24.81 L | 8.3 L/100km | ₱1,466.27 | ₱4.90 |
| EV | 759 km | 141.8 kWh | 5.4 km/kWh | ₱1,956.84 | ₱2.58 |
| **Combined** | 1,058 km | — | 5.5 L/100km* | ₱3,423.11 | ₱3.24 |

## Cumulative

| | Distance | Fuel/Energy | Efficiency | Cost | Cost/km |
|---|---:|---:|---:|---:|---:|
| HEV | 1,919 km | 165.52 L | 8.6 L/100km | ₱9,227.46 | ₱4.81 |
| EV | 3,204 km | 562.0 kWh | 5.7 km/kWh | ₱8,049.74 | ₱2.51 |
| **Combined** | 5,123 km | — | 6.0 L/100km* | ₱17,277.20 | ₱3.37 |

**Usage:** 28% F / 72% EV (last) · 37% F / 63% EV (cumulative)

*\* Combined efficiency: EV cost converted to equivalent fuel liters*

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## Executive Summary

**5,123 km tracked · ₱17,277 spent · 63% EV usage**

Saving ~₱10,900 vs an equivalent ICE SUV · ~355 kg CO₂ avoided. Efficiency is stable and strong, battery healthy at 99% SOH (~31 charge cycles). Next PMS milestone is 40,000 km — still ~12,500 km away.

## AI Analysis

### 1. Efficiency Trends
- Combined consumption improved last session: 5.5 L/100km vs 6.0 cumulative, driven by a higher 72% EV share.
- Fuel side steady at 8.3–8.6 L/100km; EV side steady at 5.4–5.7 km/kWh — no drift as the odometer climbs (now 27,544 km total).
- Trend is favorable: more electric driving is pulling the blended figure down over time.

### 2. Cost Optimization
- EV km cost ₱2.51 vs ₱4.81 on fuel — electric is ~48% cheaper per km.
- Every km shifted from fuel to EV saves ~₱2.30 at the current ~₱55.75/L pump price and your tariff.
- Already at 63% EV cumulative (72% last tank); pushing toward a sustained 70%+ is the single biggest lever, with the headroom in HEV-heavy long trips.

### 3. Usage Patterns
- EV share is rising: 63% cumulative but 72% in the most recent session — good home-charging discipline.
- ~19 days and ~1,280 km between fill-ups; ~67 km/day average.

### 4. Anomalies
- No unusual readings. The latest session is the most EV-heavy (72%) and most efficient (5.5 L/100km combined) to date — a best session, not a concern.

### 5. Performance Comparison
The 6.0 L/100km combined figure beats the mid-size SUV PHEV benchmark (8–10 L/100km) and undercuts a comparable ICE SUV (₱5–7/km) by ~38–45% on running cost. The EV portion at ₱2.51/km sits in pure-EV territory (₱2–3/km).

### 6. Recommendations
1. Keep charging at home — the 63%→72% EV trend is the right direction; aim to hold 70%+.
2. Battery is excellent — 99% SOH after ~31 cycles; recheck SOH around September 2026 (6 months after the 2026-03-07 reading).
3. Plan the 40,000 km PMS — ~12,500 km out; at ~67 km/day that is roughly Q3–Q4 2026. Vehicle is ~20 months old, well inside the optimal-efficiency window.

## Inferred Insights

| Metric | Value |
|--------|-------|
| Cumulative odometer | 27,544 km |
| Days tracked | 76 days |
| Daily average | ~67 km/day |
| Projected annual | ~24,600 km |
| Projected annual cost | ~₱83,000 |
| Lifetime savings vs ICE | ~₱10,900 |
| CO₂ avoided | ~355 kg |
| Charge cycles used | ~31 (of 18.3 kWh battery) |
| Avg fuel price | ₱55.75/L |
| Days to next refuel | ~19 days (≈late March) |
| Next PMS | 40,000 km (~12,500 km away) |

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## Data Sources

- `data/phev_log.csv` - refuel log (odometer, plug meter, fuel, tariff) backing every figure above