Clean vs Dirty Car / Much difference?
Hi, everyone!
Recently got 54.62mpg on a 746 roundtrip drive from Oakland to LA with a dirty car. How much better would my MPG improve with a clean car? |
in Gran Turismo you get +2MPH top speed!
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How much would your MPG improve...???
Zero... Zip... Nada... > |
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I have wondered if there is a difference in fuel economy between a well waxed (slippery surface) car and a dirty car. I would presume there to be a difference but real life aerodynamics sometimes doesn't do as one would think.
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"Wax: Contrary to what you may read on your favorite message board, well-waxed, smooth paint is no more aerodynamic than the worst spray-can, flat-black primer job you can imagine." |
"You painted that yourself?"
"You can tell?" "Only because it looks absolutely atrocious." "It is just as aerodynamic as a professional paint job!" "Just as... aerodynamic? All that you cared about was it being aerodynamic?" "Hey, it will not rust, either!" "It would look better if it did!" |
I generally keep my cars clean and waxed, unless like the Sentra, the paint job was trashed. There is so much wax on the Mirage, rain actually cleans the outside. Rain-X on all exterior windows keeps them as well as rendering the windshield wipers virtually useless.
Better mileage? Probably not. regards mech |
Aircraft benefit from flush-headed rivets, as seen in the movie Aviator, but they operate in laminar flow. Cars are in a turbulent flow at ground level.
Gloss paint and wax addressed limitations in the material. Modern paints can be impermeable and still have a satin or flat finish. I watched a Youtube video on car detailing, where they suggested Carnuba wax on the glass instead of Rain-X. Thoughts? |
Back in my automotive detailing days in 1984 we put the same wax on the windows and chrome as we did the rest of the paint.
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