Mini experiments: 300w vs. 800w block heater warm up time

[stovie]

Any1 try induction heating??? might do more for the same wattage, instead of heating 1 spot u could position it to heat up more area but it would only work on steel of course...... Oh heres somthing i read about, if u take two cans just big enough for 1 to fit inside the other and then run a zinc rod down the middle and feel between the cans with moter oil and then connect a drill to the zinc rod u can hit about 165F in like 30 seconds and the bigger the cans the faster they heat up maybe use that to heat the motor.......if it works of course???