[Piwoslaw]

I believe I have found a block heater for my engine, and I think my engine block has 2 plugged holes in the back, so the question is: Is one heater enough, or should I install two?

With two heaters the engine will heat up faster, which is good when I need the car on short notice. Also, I should get a higher engine temperature on cold winter mornings. And if one stops working I still have the other.

On the other hand, two heaters is twice the current draw, so wires may need to be beefed up. Also, the cost is not too easy to swallow (100€ each, plus installation).

So, will the gains of adding a second block heater be worth the extra costs? Or maybe instead of the second block heater a small glue-on oil pan heater would be more worth while?