Corner Gas has the distinction of running for 107 episodes without a single major cast change, and all of the core cast members (i.e. those featured in the opening credits) appeared in every single episode.
In real life, Brent Butt (Brent Leroy) and Nancy Robertson (Wanda Dollard) are married.
All the main characters last names, (Brent)Leroy, (Hank)Yarbo, (Wanda)Dollard, (Lacey)Burrows, (Davis)Quinton and (Karen)Pelly are actually towns in Saskatchewan.
To promote the second season, cast members pumped gas in stations across Canada.
When the show finished after its 6th season, the showrunners and cast were asked why it was ending despite being very popular. Brent Butt elucidated that he specificially wanted to end the show on a high note, rather than have it go for several season more and lose the creative and comedic flare which made it so special.