Quote:
Originally Posted by mpg_numbers_guy
My parents are the same way about their cars. So, the Prius is limited to just sidewall max PSI, which has helped fuel economy. A partial subtle grille block in the winter was also used, but nothing too aggressive since they don't monitor coolant temps. Underbody paneling might help a bit too. Replacing the tires with something like Bridgestone Ecopias or Michelin Energy Savers would probably also help, of course once the current tires wear out.
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I am going to do grille blocks and an air dam for sure. I'm pretty sure I can get away with a small kammback too, though nothing too extreme. Wheel skirts are probably out though, I might play with spats/ducting to try and help a little bit there.