FSportIS

iTrader: (13)

the actual MPG is usually 1 or 2 mpg lower than what is shown on the dash when u manually calculate it or use the app above.

I get 19 mpg on IS350 with 10% hightway and 21.5,mpg on is250 with 50% highway with traffic.

Placemtrs

Mine says 24.5 as well. Real world calculation (miles driven on tank divided by how many gallons to fill it back up) is averaging 25.1 mpg. Not too bad for my roughly 50 mile a day commuute

alpha12

I get 26.3 during the summer - 90% highway driving. I'm also on eco mode 90% of the time however and avoid braking whenever possible/coast down upon coming up to a red light/stop sign. In the winter it drops to around 24 due to warming the car up at idle etc

MWIS350

Thats nice I didn't know about before.

Hoovey689

iTrader: (16)

There is no 'ECO Mode' on the 2IS

smokyis350

iTrader: (21)

30.X MPG during my 3000 miles trip earlier this month. 95% highway.

Knarf916

Pretty ggood

xhackr

I guess that depends on what you consider accurate. I am consistently within 2% of the computer. Given the margin of error in the manual calculations, I would consider that extremely accurate.

DTE calculations are a different matter.