The Liverpool legend has been discussing all things strikers.
The striker was secured in a big-money move from Aston Villa this summer and has been tasked with scoring the goals that were so sorely lacking for the Reds last season.
He has made a decent start to life at Anfield, with him scoring his first goal for the club on his home debut on Monday in the 1-0 win over Bournemouth, while a wonder volley against Swindon also had people talking during pre-season.
And Rush says the big Belgian could be the difference between Brendan Rodgers’ side finishing fourth and sixth this season.
"It’s very early doors but I was very excited when we signed him," he told 888 Sport. "Benteke could be the difference between sixth and fourth and top four is a realistic target we have to be aiming at."
Balotelli still a great player
One striker who isn’t currently enjoying life at Anfield is Italian Mario Balotelli, however.
The former Manchester City man has been frozen out at the club this season, with his move from AC Milan having now been deemed a failure following an awful campaign last year.
Before Benteke’s arrival, it had been hoped that Balotelli was the answer to their goalscoring needs - but his time at the club has quickly turned sour after a series of unimpressive displays.
Rush, though, insists he is still a great player but must learn to put the team ahead of the individual if he wants to continue playing for Liverpool.
"Look, Balotelli is a great player but, when you’re playing for Liverpool, you have to put a shift in," he added.
"It’s not just about the individual; you have to put a shift in for the team. Brendan has looked at it and thought he needs everyone pulling together. He has to learn that if he wants to continue playing for Liverpool the team comes first."