Midgrade — usually 89 octane in Manitoba — is the forgotten middle child of the pump island. Most stations price it mechanically at a fixed step between regular and premium, which means the way to a cheap midgrade fill is almost always the same as the way to a cheap regular fill: the competitive corridors. On Regent Avenue, McPhillips Street and the Pembina strip, where warehouse-club and co-op pricing squeezes regular, the midgrade posted beside it gets squeezed too.
Comparatively few vehicles actually call for 89 octane — some older engines, certain trucks and a handful of models whose manuals split the difference — and at many stations midgrade is simply a blend of the regular and premium in the tanks. If your manual says regular, buy regular; if it says 89, the ranked list below shows every Winnipeg-area station posting a live midgrade price, cheapest first, refreshed hourly.