The block heater from saturn is a radiant element that sets against the block, so I don't think it would be near as efficient as one in coolant. I don't know for sure what the wattage is, but I was thinking I'd heard 500w
I would totally agree with oilpan4, I think 4x the heat for a 1/4 of the time would be far better.
If I ever get around to swapping to a manual steering gear, I'll remove my currently disabled power steering pump, which will allow me a great place to add a circulation heater. I don't think I want to go past about 1800w total though, so I can still use a standard 110 outlet
edit: so most ppl on the saturn forums seem to say 300w block heater. considering that, it doesnt sound as inefficient as i was thinking
edit#2: so yea, looks similar to metrompg's bolt on heater which is also 300w. post15-
http://ecomodder.com/forum/showthrea....html#post7274