With temps like 22f, I'd definitely think about doing a grill block.
Our temps are currently 35-40f mornings, 50f afternoons. A full lower grill block (left the upper open) has definitely sped up my warm up times and keeps the engine warmer when I use the heat in stop-and-go traffic.
It's a Civic hybrid, I just shoved two cut pieces of large-sized foam pipe insulation into the slots... I was going to zip tie it, but it's been so secure I haven't needed to
2004 Honda Civic Hybrid "Eeyore" @ 50 mpg
-MaxIMA battery from Bumblebee
-Lower grill block
RIP 2000 Insight, 40k miles @ 69.2 mpg
2000 Insight, "The Basket Case" @178k miles, 64.5 mpg so far
Last edited by samwichse; 12-12-2012 at 02:56 PM.