Benteke, an £8million summer signing from Genk, chalked up his 16th goal of the campaign during the weekend win at Reading to lift Villa out of the Barclays Premier League bottom three.
The last Villa player to reach the 20-goal mark was Juan Pablo Angel during the 2003-04 season and Benteke has nine games remaining in which to reach that milestone.
Lambert said: "If he gets 20 goals, then he's doing something good for us.
"The big guy, over the course of the whole season, has been excellent for someone just 22 years of age,
"I don't need to say much to Christian. He is a young guy still learning but his performances have been exceptional.
"He has been massive to us and also scores goals for a very talented Belgium side.
"For his age, he has played so many big games already, internationals, and it looks like Belgium will qualify for the World Cup.
"The lad knows big-time football but whatever you can do to help him, then you will speak to him."