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Old 12-31-2009, 02:37 PM   #14 (permalink)
EcoModding Lurker
Join Date: Oct 2009
Location: DFW
Posts: 87

The Truck - '06 Chevrolet Silverado Ext Cab 4x4
90 day: 18.5 mpg (US)
Thanks: 4
Thanked 33 Times in 15 Posts
Well - it was a terrible day to do any real testing but it was the only time I'll have for a while.

I warmed the truck up and drove back and forth on a 1.5 mile stretch of straight rural highway.

I ended up doing a B-A-B-A test. Each leg was 4 sets of out and back.

B: avg mpg 19.6
A: avg mpg 18.8
B: avg mpg 19.4
A: avg mpg 18.8

So it looks like a lackluster improvement of ~.7 mpg or ~4%

The ambient temp was 10* and there was a NW wind at 10-15 mph. The road was East to West.

So I don't think the test is really all that valuable. I'll be interested to see how my mileage looks over time.

I'll take some more pics and maybe you all can let me know if you see any areas that may need improvement. I was really hoping to get 10 - 20% improvement.

(EDIT: testing speed of 55 mph)
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