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I have noticed only a very slight drop in MPG following my 410 install. I base this on hwy driving in 6th gear at 75-80 mpg only. When off hwy I am normally not a slow driver (but, of course, obey the speed limits).
i have an a6 auto but i went from 26 mpg supercharged w 2.56 to 3.15 gears and lost about 1 mpg on the same 200 mile trip at 70 mph from albany ny to plattsburgh ny.
Mileage around town is better because I am not wailing on it yet. It is posted to demonstrate that good mileage can be had when you are driving the car normally with 4.10s. I lost appx 1 mpg on the highway.
Really? I never would have guessed............ Yes, I am aware but I was expecting a larger dropoff in mpg.
I said - if you drive "normally" meaning not with your right foot fully extended to the carpet. Thanks for being a "Master of the Obvious". Please - tell me when I can expect the moon to reappear.