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Old 03-03-2012, 05:04 PM   #3 (permalink)
redpoint5
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Join Date: Aug 2010
Location: Oregon
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Acura TSX - '06 Acura TSX
90 day: 24.19 mpg (US)

Lafawnda - CBR600 - '01 Honda CBR600 F4i
90 day: 47.32 mpg (US)

Big Yeller - Dodge/Cummins - '98 Dodge Ram 2500 base
90 day: 21.82 mpg (US)

Chevy ZR-2 - '03 Chevrolet S10 ZR2
90 day: 17.14 mpg (US)

Model Y - '24 Tesla Y LR AWD

Pacifica Hybrid - '21 Chrysler Pacifica Hybrid
90 day: 43.3 mpg (US)
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This question sparked an interesting realization on my part. If an engine were 30% efficient, and the efficiency increased by 1%, the overall mpg of the vehicle might see a 3% improvement. At minimum I would expect greater than a 1% increase in overall fuel economy. Of course, there are many variables at play here, and stating a 1% engine efficiency increase is way too simplistic.
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