Mist often drops from the sky, thickly, this time of year here in Southern California (think of a classic Humphrey Bogart foggy scene... it was shot near where I live).
Take a look at photos 1, 2, and 3 in my photo album "Black and Green" and tell me what you think of the similarities and differences between the driver and passenger side air flow traces. Remember, I have no outside mirror on the passenger side:
Fuel Economy, Hypermiling, EcoModding News and Forum - EcoModder.com - California98Civic's Album: black and green
Top speed was 60 mph, held for 10 or 15 seconds before coasting to this stop.
I think it suggests my mirror delete might not be doing much good. Maybe that it is even harming the aerodynamics of the vehicle.