Diesel Price Drops As Province Uses Interrupter Clause Halifax, NS, Canada / Country 103.5 Kevin Northup Dec 21, 2022 | 6:20 AM Bill Smith / CC The price of diesel fell over seven cents a litre at midnight. The province used its interrupter clause to adjust the price. You’ll now pay about two-dollars a litre to fill up. Regular gas didn’t change, it will Friday at midnight.