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Old 06-19-2013, 02:10 PM   #100 (permalink)
Blue Angel
EcoModding Apprentice
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Join Date: Feb 2013
Location: Ottawa, ON, Canada
Posts: 190

Previous Car - '12 Chevrolet Cruze Eco MT
Team Chevy
90 day: 44.29 mpg (US)

535d XDrive - '16 BMW 535d M-Sport
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Thanked 59 Times in 38 Posts
2012 Cruze Eco

This was my first attempt at logging some speed vs. consumption data. I used the on board mileage computer corrected at 7% as it is optimistic, so these should be pretty close. Two different roads used, one for low speed and the other for high, both relatively level and in calm conditions, temps between 16C-18C, two way averages.

The car is a '12 Eco with a manual transmission. Modifications are higher tire pressure, lowering springs, wider plug gaps (0.033") and 91 octane fuel. The only mod that's guaranteed to increase efficiency is the tire pressure, but the car already has LRR tires. Lowering the car reduces its frontal area, but the suspension geometry of the Cruze adds significant negative camber to the front tires as the car gets lower, which will likely increase rolling resistance.

Speeds were in increments of 10km/h between 50-100, but converted to MPH on the chart. Speeds and MPG seem to relate fairly closely to the Motortrend chart from the review posted earler at both 50 MPH and 60 (62) MPH.

Next time out I will try to do highway runs at 110 and 120 km/h as well.
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2016 BMW 535d
4100lb XDrive Eco-Yacht
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MetroMPG (06-19-2013), mikeyjd (06-19-2013), PaleMelanesian (06-19-2013)