According to TrueCar.com, actual fuel economy numbers increased from 21.6 mpg in July 2011 to 23.1 mpg in July 2012, edging up over May 2012 which was at 23.0 mpg. A strong correlation between gas prices at the pump and consumer choices remains relevant.

Find out which manufacturers showed the greatest increase in fuel economy.

	Average TrueMPG			Average Car TrueMPG			Average Truck TrueMPG
Manufacturer	Jul-12	Jul-11	YoY	Jul-12	Jul-11	YoY	Jul-12	Jul-11	YoY
Chrysler	19.7	18.9	0.7	23.0	22.2	0.8	18.3	17.8	0.6
Ford	22.0	20.5	1.5	26.2	25.0	1.2	19.7	18.6	1.1
GM	21.1	20.6	0.6	25.3	23.8	1.6	19.1	18.9	0.1
Honda	25.0	23.2	1.8	28.2	25.8	2.3	22.3	20.6	1.6
Hyundai	27.8	25.3	2.5	29.5	26.1	3.4	23.5	22.7	0.8
Nissan	23.2	22.7	0.5	26.0	25.5	0.5	20.1	19.8	0.3
Toyota	24.2	22.8	1.4	29.8	27.2	2.6	19.3	18.8	0.6
Volkswagen	26.4	24.9	1.5	27.6	26.5	1.1	21.9	19.9	2.0
Industry	23.1	21.6	1.5	26.9	24.9	2.0	19.8	19.0	0.8