The former Watford forward experienced impressive form upon his return to England after joining United in January.
Ighalo has scored four goals in three starts since his change of loan from Shanghai Shenhua, and is now in line to make his stay permanent.
And he thanks his teammates David de Gea, Sergio Romero and Juan Mata for their help in his rapid success.
“I have a lot of guys out there who helped me. The guys in the locker room are very good guys, ”said Ighalo on Instagram Q&A.
“The first time I ever set foot in this locker room – wow. There were two or three players who took me and made me feel comfortable and comfortable.
“After two or three days, we started to live like brothers, like I had been there for five years, laughing together and making jokes together.
“Especially Juan Mata, De Gea and the other goalkeeper Romero, because they speak Spanish and I speak Spanish. “
Ighalo spent four years on loan in Granada, Spain, hence his ability to converse with his teammates in the language.
However, he has never managed to make his move permanent, but it seems likely that he will do so at United.
Rumor has it that the 30-year-old will complete a £ 15m transfer in the summer.
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And he hit back at his critics who wondered why United signed it in the first place.
“First, it was” Why are you going to England? “With your age and everything and that it is one of the greatest teams in the world,” he added.
“Number two, no one has given me a chance, but I know I work hard.
“I don’t get carried away, I don’t listen. I do my job and stay focused. “