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RedDevil · 09-26-2013, 05:52 PM

A temperature drop will definitely cause higher fuel consumption, due to:
- The engine needing more time to reach normal operating temperature,
- The air being more dense, hence higher air resistance,
- The tire pressure sagging due to lower temp, causing higher rolling resistance;
- The tire flexibility lessens with cold, again higher rolling resistance;
- More friction from relatively cold transmission oil and bearing grease etc.;
- The fuel mixture will be adapted to weather conditions, so winter gas is more volatile and less dense so less energetic than summer gas;
- Heavier traffic as the schools have begun again;
- The school run itself (it has an effect on my FE for sure);
- Helping out Santa

How in hell did you keep your FE within just a 4% drop?

09-26-2013, 05:52 PM	#3 (permalink)
RedDevil Master EcoWalker Join Date: Dec 2012 Location: Nieuwegein, the Netherlands Posts: 3,998 Red Devil - '11 Honda Insight Elegance Team Honda 90 day: 49.01 mpg (US) Thanks: 1,711 Thanked 2,245 Times in 1,454 Posts	A temperature drop will definitely cause higher fuel consumption, due to: - The engine needing more time to reach normal operating temperature, - The air being more dense, hence higher air resistance, - The tire pressure sagging due to lower temp, causing higher rolling resistance; - The tire flexibility lessens with cold, again higher rolling resistance; - More friction from relatively cold transmission oil and bearing grease etc.; - The fuel mixture will be adapted to weather conditions, so winter gas is more volatile and less dense so less energetic than summer gas; - Heavier traffic as the schools have begun again; - The school run itself (it has an effect on my FE for sure); - Helping out Santa How in hell did you keep your FE within just a 4% drop? __________________ 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 0.2 Gmeter or 0.13 Mmile. For confirmation go to people just like you. For education go to people unlike yourself.