rleechb

fyi -
I've reset the AVG already (did it a few days ago). Gas mileage is still about the same. I also did the manual way of computing gas mileage, and it's about 1 mpg more than what the computer says. I drove yesterday in eco mode... and I'm getting about 16 mpg

nathantse

What gas do you put into it?

And do you drive well enough to have that ECO light always lit?

dojoman

iTrader: (5)

I get about 16-17mpg in the city with S+ mode RWD IS350. Are you sure yours is not RCF?

tea

OP stated he only drives a few miles a day. that explains why he only gets 12 mpg. short trips kill your mpg

ARM350F

I have a 16 350 and I have a heavy right foot at times and I average anywhere between 13.9- 18.1 depending on how I drove that week. One week I got 23 but that was a lot of highway driving.

rleechb

Turned off the ECO light actually. Thing was annoying. I drove like a grandma in ECO mode last night just to see if mileage would improve. I got around 16.5 driving extremely conservatively in ECO

markrivers

i'm so glad i'm reading this thread prior to getting an 2016 IS 350 F Sport.
r

itisme1760

My trips are short too, about 9 miles round trip, all in city, but what kills it is that the speed limits on these roads are 45mph and people are going 60mph, so my avg MPG is always around 17-18 mpg while I go from 0-50mph a few times. It does suck cause even my 2001 BMW 330i could eek out 20+ mpg in city.

EDIT: I should add that I drive a 2014 IS350 F Sport on ECO mode.

4TehNguyen

iTrader: (1)

weird i got 21.5 mpg with an 16 mile city-ish round trip. Driving normal mode. Getting 16 in the GT

doodlebug

I have almost 28K miles and 32 months of ownership. I average about 20-22 and always have. I'm rarely on the highway, it's generally suburb driving with red lights galore.

mjn88

I drive pretty hard on mostly in the city and i still average about 20-23mpg.

LexGamer

Similar experience to OP (not quite that bad). Was hoping for at least 23 combined city/hwy

ssmoked

try disconnecting the battery for a minute and let ecu reset. Also check air filter and oil level (not over filled). Something is definately malfunctioning or clogged

if the above doesn't fix the issue, shoulda got a rcf haha. I average 14.5-15 all city, sport+, drive like I stole it daily in my 467hp v8 rcf

btw what's eco mode

Fsportme

How many miles are you driving and what type of terrain? Are you running premium fuel? Stock wheels? All those can mess with your avg.

Olasek

Frankly I have my doubts whether Sport version makes any difference, engine, transmission are the same. I have 2016 IS350 (regular), RWD, with hardly 2k miles and I am finally able to report some mpg numbers. Before that my driving was mostly city driving and this is very unreliable way to gauge fuel economy, in my (mostly) city driving I have seen numbers like 20 mpg average - nothing better, I was mildly disappointed. But today for the first time I took the car on a long stretch of freeway driving, crossing Nevada and I saw consistently numbers likes 28 mpg at 80 mph and 37 mpg at 60 mph. I think this is pretty good, I can't complain. If you are in Sport mode you are not going to see those numbers since you will rarely be in the top gear, I got those numbers being in the 8-th gear. The bottom line - it may not be the most economical city vehicle but on freeways it does quite well.