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Old 08-29-2011, 09:37 PM   #66 (permalink)
JasonG
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Join Date: May 2009
Location: Charlotte NC / York SC
Posts: 728

05 DMax - '05 Chevrolet 2500HD
90 day: 18.48 mpg (US)
Thanks: 120
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Quote:
Originally Posted by wyatt View Post
I will echo what Aerohead said. When I built and attached the SedanKamm to my car, I didn't see much difference around town, and even on the interstate I noticed little difference... for the first half of the trip! Overall, on interstate travel I saw a 6% gain in fuel economy, but that was over 1800 miles of 65-70 mph driving that it all averaged out. If I had gone with the first 800 or 900 miles, I would have been VERY discouraged!
Is it possible the ECU needs time to compensate for the reduced load ?
I sort of doubt it on a '94, but I know newer cars do adapt to the driver. Transmission control units too.
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I can't understand why my MPG's are so low..........
21,000lb, 41' Toy Haulers are rough on FE!
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