After the lamp is lit, it will heat the lamp, and the heat of the lamp will be transferred to the oil through heat transfer, so that the internal energy of the oil will increase and the temperature will rise;
If it is in the interlayer Add water, because water has a larger specific heat capacity and can absorb more heat, causing the temperature of the oil to rise more slowly, so the relative oil consumption is less;
So the answer is: heat transfer; Increase; specific heat capacity is large.