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Old 08-03-2013, 03:33 PM   #8 (permalink)
In the fasting lane
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Join Date: Dec 2012
Location: Nieuwegein, the Netherlands
Posts: 3,865

Red Devil - '11 Honda Insight Elegance
Team Honda
90 day: 49.75 mpg (US)

It - '09 Hyundai I10 Active Cool
Team Hyundai
90 day: 29.76 mpg (US)
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A timing belt change may destroy FE if the timing is offset during the process. One to look out for.

Does the engine run smooth when idling? An unfiring spark plug halves your economy and spoils performance.

How does it coast? (is it a manual or an auto?)
What happens when you put it in neutral, does it maintain speed or lose it quickly?
If the latter something's wrong with the tires, wheel alignment or drivetrain beyond the tranny. If it coasts fine the problem is ahead of that.

Raising tire pressure should help FE a bit. If it helps a lot, like more than 10%, then your wheel alingment is likely out.
2011 Honda Insight + HID, LEDs, tiny PV panel, extra brake pad return springs, neutral wheel alignment, 44/42 PSI (air), PHEV light (inop), tightened wheel nut.
lifetime FE over 0.17 Gmeter or 0.1 Mmile.

“Great minds discuss ideas; average minds discuss events; small minds discuss people." - Eleanor Roosevelt

Last edited by RedDevil; 08-03-2013 at 03:39 PM..
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