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FR-S Matt · 09-03-2013, 09:39 AM

Fuelly is a great tool to use as well just like that app. Runs off your odometer or trip meter. My MPG gauge is usually 1.5-2 mpg off from the actual number mainly because it factors in idle time.

09-03-2013, 09:39 AM	#13
FR-S Matt Banned Join Date: Nov 2012 Drives: 2013 Ultramarine FR-S MT Location: Round Rock, TX Posts: 3,941 Thanks: 679 Thanked 1,771 Times in 1,111 Posts Mentioned: 38 Post(s)	Fuelly is a great tool to use as well just like that app. Runs off your odometer or trip meter. My MPG gauge is usually 1.5-2 mpg off from the actual number mainly because it factors in idle time.