I'm thinkin this whole timer issue has been gone through. That $60 timer will take like 4 winters to pay for in electric!
Besides that, these block heaters work like a slow cooker, and 2 or 3 hours aint gettin it when it's 0 and blowin! A stove top or oven for that matter gets hot and cools, gets hot and cools in a series of cycles to maintain a preset temp. A slow cooker (block heater) only heats to a preset temp and stays there, waiting on the surrounding to achieve the same tempurature. And even then the oil is gonna get cold being in the pan.
I like my baby to stay toasty, I'll pay the $5 a month