United secured a last-gasp January loan deal for Ighalo as Ole Gunnar Solskjaer desperately tried to solve his striking crisis in the absence of the injured Marcus Rashford.
But Scholes has questioned the credibility of the Nigeria international’s record in China and whether he has the ability to score goals at Old Trafford.
He told Robbie Savage’s Premier League Breakfast: “I don’t think he’s a signing for the long term. I think his scoring record in China is very good, but is it that credible? I don’t know.
“He is an out-and-out centre forward, I don’t think United have an out-and-out centre forward. He’ll play with his back to goal and he might bring players into play.
“It’s good to have an extra body, but when you’re United you want an extra body with quality and he’s got that to prove.
“He’ll bring something different. I don’t see him starting many games.”