But that gap could have been even more had the Hoops not lost the Old Firm Derby to the Gers in December.
The derby was billed as the season-defining match by many fans and after Celtic lost it 1-0 many believed that Rangers would move ahead in the title race.
That though has not been the case since the Teddy Bears have dropped multiple points since that game and now Brendan Rodgers has revealed that the Old Firm Derby is no longer the match which defines the whole season.
“I don’t think so – I think it will be important,” Rodgers said.
“The league is very competitive. We are six points clear but there’s a long way to go but Aberdeen and Kilmarnock are up there with Rangers.
“There’s a lot to play for and it’s an exciting challenge.
“The league’s been great this year, a lot of good teams and a lot of good football so it will be an interesting run in.”
Since that victory over Celtic, Rangers have dropped points against Kilmarnock whereas the Hoops have scored 12 goals in just four games.
And the season could get even worse for Steven Gerrard’s men if they keep on dropping points since Kilmarnock are tied on points with them while Aberdeen are just two points behind them.