Oil Pan heater

[Goran]

I have some new data.
Using a 110Ah Bosch S5 battery which is in a very poor condition, I got the following results.
At start:
VCDS oil temperature before connecting battery to pan heater: 8C
Battery voltage under load: 11.7V
Current: 9.0A
Watts: 105.3W

after 30 minutes
VCDS oil temperature: 12C
Battery voltage: 11.0V
Current: 8.5A
Watts: 93.5W

Conclusion, it seems that it takes 7.5 minutes to heat the oil by 1C with input average wattage of around 100W