How to heat oil for frying effectively and safely?

To heat oil for frying effectively and safely, use a deep fryer or a heavy-bottomed pot with a thermometer to monitor the temperature. Heat the oil slowly to the desired temperature (usually between 350-375F) and avoid overheating. Never leave hot oil unattended and always have a lid nearby to smother any potential fires. Be cautious when adding food to the hot oil to prevent splattering.