Thanks to the warm weather, finally got the coroplast aeromods on the car.
The valence and grill block went on OK. The double sided tape was not sticky enough to hold on the fog light blocks. I will have to find a material that bends easier.
With both vent holes closed, I ran the car on the highway and temps went up to 210F and I smelled things getting hot, probably heater core. Usually the temp is 195F. I pulled out one vent and temps were around 207F, moving between 200 and 207F. I am going to run with two vents open for now, and maybe next winter close them back up.
I don't have any good comparison tests yet, but I have to say it was much easier to hypermile my way into the 40's mpg. With no hypermiling, I did a 7 mile run on the interstate at 70mph, and a 7 mile, 60mph run back on the state road with no attempt to hypermile, except that I can't help but coast a long ways before stops. The result of the no hypermile test was 38mpg, compared to EPA highway 34mpg.
