Went buy the grocery store and wasn't thrilled with the price of V.O. However Canola Oil was cheaper, before I buy Canola Oil I just want to first make sure it's ok to use (No issues) just for the simple fact all I hear is use V.O. so maybe there is a reason why no one says use Canola Oil. Second, besides used V.O. where can I buy cheap V.O. or Canola OR? Also do I dilute the oil with water and if so what ratio?