I guess I'd hardly have preheat issues here where I live. The ambient temperatures under the shade are seldom below 30°C during the day and rarely fall below 25degC at night. If I ever require more than one dishful of alcohol for this, then something else is at fault. There had been exceptions (abnormal) though. That was only because I was trying out pure diesel as the fuel instead of kerosene. In those cases, I might need up to three dishfuls for the preheat.