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Old 07-03-2014, 08:50 PM   #17 (permalink)
spacemanspif
Spaced out...
 
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Join Date: Jul 2013
Location: Dirty Jersey
Posts: 748

The New Focus - '07 Ford Focus ZX5
90 day: 32.44 mpg (US)
Thanks: 142
Thanked 205 Times in 149 Posts
Little update: If you take a look at my fuel log you'll see that I ran my best tank ever at 47.5mpg! I'm not sure what this is due to however because my previous tank was a lack-luster 41.8 but that was with a pretty bad traffic jam. Also, this tank saw about half the miles at 65mph not my typical pace of 60. Not sure if the extra 200rpm is more in the engine's economy "sweet spot" but it sure seems to not hurt the mpg. Testing continues and we'll see if I can net a increased trend over previous tanks. Any look at my graph shows that I'm pretty inconsistent so as long as I don't see any general decrease in mpg I think the dam and block are going to stay. In the future I'll extend the dam outward to double as wheel spats and just to block more air from going under the car.
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-Mike

2007 Ford Focus ZX5 - 91k - SGII, pending upper and lower grill bocks - auto trans
1987 Monte Carlo SS - 5.3/4L80E swap - 13.67 @ 106
2007 Ford Focus Estate - 230k - 33mpg - Retired 4/2018
1995 Saturn SL2 - 256K miles - 44mpg - Retired 9/2014

Cost to Operate Spreadsheet for "The New Focus"

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