Isfast

iTrader: (13)

I am getting 18 avg. Just normal driving city and highway. I am averaging 19.5 in the ISF. Same route, same type of driving.

spwolf

good to hear that atkinson cycle works... thats better than what my GS350 AWD got on highway when babied.

BAlbright

Did my first long drive in my RCF yesterday when going to a SCCA regional race in W Virginia. Some 225 miles round trip with mostly expressway driving. For a car that produces almost 500hp I was pleasantly pleased with its fuel economy. It could have been a little better but my enthusiasm after the race with a few full throttle blasts put a small crimp in it

Carnevino

I agree, I've been pleasantly surprised myself. I'm getting the same results driving ~80 between Destin to Atlanta and down to Tampa/Orlando. I've neve used Economy Mode, I just leave it normal for the highway. I have a lot of driving coming up this week so maybe I'll see what Economy can do.

aginnt

https://www.cars.com/articles/what-l...1420680695210/

best fuel economy in its class.

followtheF

Not exactly, unfortunately. The RC-F had the worst measured performance, but with the most optimistic trip calculator, on AVERAGE it had the best numbers. Pretty good way to game this test - just way overpredict to bring up your average.

It's ok, I'm happy to lose this battle, and not surprisingly either since the big NA engine should be thirstier than the small FI competitors.

Venturi

It would have scored much better if the parameters were even.

They put the M4 in economy mode but had the rc f in normal mode, obviously not apples to apples on the capabilities then

DougHII

Yep, I have gotten around 26.6 on several longer trips in Economy mode. My problem is the lack of self control, followed by the occasional Sport + blast on bits of open road here and there. Otherwise, I would Imagine around 28.X also.

IMCHIA

After 3,000 miles, here's a couple thing I noticed. The computer can say you average 17mpg for that specific tank but when I did it the old fashion way, it is always .5 to .7 less. Actual mpg coule probably be 16.4 mpg.


Worst tank: 14 mpg
Best tank: 17mpg

Average 16mpg

Fill up every 3-4 days.

TruPlaya26

iTrader: (4)

I'm averaging about 16 mpg with mixed highway/city driving. I drive only in Sport or Sport + and have my A'pexi throttle controller on Red or Purple all the time.

GGawaran

Winter Mix: 19.5-21
Summer Gas: 21-25.5

I drive a lot of highway to get to work 85% highway, 15% city.

Ne1tHeRe

iTrader: (3)

Avg about 14-17 (sport+) mixed but more on the city side...and 8mpg was the lowest I saw when I was having lots of fun hahaha

equalme

Avg 14-16 in Sport+ mode and fairly heavy foot. I got ~26 with cruise control set at 80mph.

tarponman

I'm at 11.1. Been a few weeks since I reset it. I find it impossible to get anything higher than 18 or 19 even with mixed highway/city driving.

On road trips I still only get low 20's.

papasmurf1

I'm gettin 15-16