No, I don't grease my scalp. Never have. I'm more likely to apply WildGrowth Oil or Jojoba Oil to my scalp when it's wet, if I feel I need some additional moisture. And when I have applied any kind of greasy pomade to my hair when dry, it always leaves my hair looking too greasy and limp.
And, no, greasing your scalp will not make your hair grow--unless you are using some type of NON-petroleum, NON-mineral oil based grease that contains additives that increase growth: sulfur, rosemary oil, sage, etc. then MAYBE that would increase growth.