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Old 03-26-2014, 01:42 PM   #74 (permalink)
bkuehl
EcoModding Lurker
 
Join Date: Apr 2012
Location: NH/NY
Posts: 2

Civic si - '07 Honda Civic Si
90 day: 27.5 mpg (US)

Badillac - '07 Cadillac CTS V
90 day: 18.16 mpg (US)

Fiesturd - '15 ford fiesta se sedan
90 day: 42.12 mpg (US)
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Quote:
Originally Posted by Mista Bone View Post
You will likely find out that your mileage is LOWER from lugging the car in too tall of a gear, keeping the engine out of the range it is most efficient in.

The 16 valve DX motor likes a higher cruising rpm, say 2800-3200 rpm, over the lower rpms the HF/CX or VX/HX on low cam to keep intake port velocities up. This helps with even fuel atomization and dispersion in the cylinder.Just look at the throttle body diameter.

Now with better aero than I had 10 years ago it might be possible to lower the cruising rpm without lugging the motor.
While I have no scientific proof to back it up, I'm going to side with bone here. I get noticeably better fuel economy on my 16v when I shift at higher RPM's.
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