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Owner: optiwatch
speedy3: 2007 Mazda Mazda 3 mazdaspeed3
Displacement: 2.3 L
Fuel type: gasoline
Transmission: manual
Curb weight: 3153 lbs
Coefficient of drag: 0.32
Frontal area: 25.5 sq.ft.
Instrumentation: factory installed
Description: was inactive for a while and lost some info
best mpg: just shy of 32 mpg (95% hwy)
2016 avg: 25.5 mpg (mostly local driving)
No scan gauge yet, but the most efficient speed seems to be around 32-35 in 6th gear.
Build Thread:
Current Mods: AEM CAI(cold air intake) withOuterwears prefilter to prevent water intake
- better power
- no impact on normal driving mpg
- only makes a difference under heavy acceleration

Planned Mods: weight reduction mods
Estimate: the most I could remove is around 700 lbs
For now the best mod is to lighten my foot.

change the gearing for hwy speeds reducing the rpms from 3200rpm at 70-75mph.
Official Fuel Economy Ratings
EPA city 18 mpg(US)
EPA highway 26 mpg(US)
EPA combined 20 mpg(US)

Actual Fuel Economy Performance
Lifetime 0 mpg(US)
Last 3 tanks 0 mpg(US)
90 days No data entered

(Created: 2016-10-03 16:24:00 / Modified: 2016-10-03 16:24:00)


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