Wow, scanned the link paper and it looks like the computer said it was better. I think you'd find real world testing on big things like cars would yield small results. This seems easy enough to test on a real vehicle, I wonder why it was not done? Computers are susceptible to the dreaded GIGO effect even today in 2015. It has been discussed a lot here on ecomodder mostly regarding golf ball style dimples. It is in fact the very reason I started posting on this forum cause I was thinking of dimpling my GMC pick up.
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