Open By year (or a year URL such as /leaders/2026) and pick a model year. Each row is the unique NRCan winner for that list: most efficient overall, best battery-electric, best hybrid (including plug-in), best gasoline (no hybrid or diesel), highest energy use, and lowest tailpipe CO₂ among models that still emit.
“Top 20” is the same unique-model ranking, not every trim. Class lists (compact, small SUV, pickup, and the rest) use NRCan’s vehicle class field. Names link to the car sheet with rated L/100 km, CO₂, and IBC indexes when published.
For how the catalog mix changed — hybrid and EV share, SUV share, gasoline-only medians — use Charts and Q&A. Method: By year lists.