chevy cobalt 37 mpg - Toyota Yaris Forums

roxy1 · 03-11-2009, 08:02 AM

i dont know how much higher gearing would really help mpg in a corolla or yaris. at 60 mph, the rpm's are reasonable. at 60 mph, my yaris was at 42+ mpg easily and 40+ in my corolla at that speed is pretty easy also. when you get up to 70+ mph, you are increasing wind resistance exponentially, and that will kill your mileage regardless of rpm's.

i also believe in the real world, some cars really do better at beating epa estimates than others. take that 5 speed auto in the civic. now, take a look at real world numbers here:

http://www.fueleconomy.gov/feg/calcu...umn=1&id=23502

most of the entries are a majority of highway driving for that 5 speed auto, and ONE single driver out of 88 drivers achieved 40+mpg and the average of 31.3 is nothing special. that same car in a 5 speed manual (which revs higher than a corolla or yaris in high gear) actually averaged 1 mpg higher than the 5 speed auto. thats real life.

now, take a look at the yaris. it seems the epa estimates are much more easily achieved, with the auto averaging 34.8 mpg and the higher revving manual transmission averaging 38.9 mpg.

so, 2 things. the gearing on these cars did not help real world effieciency, and some cars do beat epa estimates more easily than others.

and those cvt transmissions. im seeing only miserable mpg numbers on eco cars using them thus far (versa, sentra, caliber..)

ill take a 5 speed manual any day and beat what any cvt or 5 speed auto will give me in mileage.

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03-11-2009, 08:02 AM	#18
roxy1 Drives: 2014 yaris 5 speed Join Date: Aug 2006 Location: michigan Posts: 642	i dont know how much higher gearing would really help mpg in a corolla or yaris. at 60 mph, the rpm's are reasonable. at 60 mph, my yaris was at 42+ mpg easily and 40+ in my corolla at that speed is pretty easy also. when you get up to 70+ mph, you are increasing wind resistance exponentially, and that will kill your mileage regardless of rpm's. i also believe in the real world, some cars really do better at beating epa estimates than others. take that 5 speed auto in the civic. now, take a look at real world numbers here: http://www.fueleconomy.gov/feg/calcu...umn=1&id=23502 most of the entries are a majority of highway driving for that 5 speed auto, and ONE single driver out of 88 drivers achieved 40+mpg and the average of 31.3 is nothing special. that same car in a 5 speed manual (which revs higher than a corolla or yaris in high gear) actually averaged 1 mpg higher than the 5 speed auto. thats real life. now, take a look at the yaris. it seems the epa estimates are much more easily achieved, with the auto averaging 34.8 mpg and the higher revving manual transmission averaging 38.9 mpg. so, 2 things. the gearing on these cars did not help real world effieciency, and some cars do beat epa estimates more easily than others. and those cvt transmissions. im seeing only miserable mpg numbers on eco cars using them thus far (versa, sentra, caliber..) ill take a 5 speed manual any day and beat what any cvt or 5 speed auto will give me in mileage.