So the other morning, probably a week or two ago, I made my first ecomod on the new car. Using some leftover LDPE foam from packages at work, I made a grille block!
I'm noticing improved warmup times; between .75 and 1.5 miles shorter.
It's similar to pipe insulation foam. Not quite the same stuff, but it was available, free, and it's really easy to work with. a couple quick slices with a pocket knife and about 10 minutes.
Now, to start on the coroplast underbelly. I have one 2x4 foot piece of white at home to start with...