Re: Current vs Average Fuel Consumption
The way I understand it, the computer compares the fuel flowing into the engine with road speed. If you are sitting at a light idling, you are getting 0 mpg. Coasting down a hill, it is using practically no fuel, so it goes to 60.00 mpg (in the USA). It isn't actually getting 60 mpg; it's basically traveling for free, so it could be 200 mpg, but Nissan has it display 60 mpg while it is not pumping fuel in there. Coasting down a long hill, it will eventually go back to something reasonable as more fuel is used to keep the engine running.
I like to watch the instant mpg. Going up even a slight incline will drop me to 15 mpg. Same for accelerating from a stop. I've seen readings below 10 mpg.
Doing the math after a fillup always gives a figure different from what the computer says.
2009 Steel Gray 1.8SL
Pioneer AVIC-X910BT Navi Head Unit
Pioneer ND-BC20PA Backup Camera
XM and iPod adaptors
Interior LED Accent Lighting
LED interior bulbs
NRG Carbon Fiber Hood Dampers