Quote:
Originally Posted by Christ
Well, that's fairly accurate, except you're not going to get a good reading with only 1 mile of testing. Hell, some cars wouldn't use the fuel in the lines in 1 mile. I don't think my Civic even exchanged the fuel rail in 1 mile at 65, honestly.
They should have done an average of at least 3 20 mile runs using the same method for each mod, setting the cruise control, and attempting to stay within a set parameter for wind speed and relative temp/humidity.
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They clayed the whole car smooth, which added some weight, but then they did 5 runs and averaged them. Then they made the dimples and even put the little caps they carved out into the car so that the weight was the same as before, and then did 5 more runs and averaged them. The way they measured the fuel is probably more accurate than using a scangauge.
"26 and change" mpg for the smooth car
29.65mpg for the dimpled car
Now where's the 11% improvement? 29.65/26=1.14 That would mean it was 26.7mpg when smooth wouldn't it?