Tanning oil wont make you orange but it will take longer to change your skin tone, tanning oil also attracts the sun more, the lotion doesnt. Tanning lotion will make you look orange.(Personal experience).
as mentioned the oil intensifies the radiation your getting and makes you skin dark. it's definately not orange, it's a brown tan. it's really horrible for your skin, yada yada premature aging, wrinkles, cancer....