21.7 mpg with around 13400 miles on my 350, just got 25-26 tank mpg on my vegas trip last weekend with minor traffic, a/c on all the way

 

I go when the light comes on and I usually would have driven 400 miles.

 

30mpg all time, 90% hwy...have about 31k (IS250 AWD). My commute is really long...

 

Wow...I'm surprised there isn't that much of a difference between the 250 and the 350. I'm averaging 26.6 over the last 9,000 miles or so in my 350 and do a 70/30 highway/surface.

I'm surprised the 250's are barely touching 30 driving the same kind of roads.

So much for the "I bought the 250 to save gas mileage" theory. What is that, like $150 a year?

 

31.5 mpg average on 8200 miles with my 250 so far. 93 octane and 70 % highway, 30% city. i am very happy!

 

lol.. i have a whopping 18.5 on my 350.... i do about 80% local because i avoid the highways on my way to work due to rush hour

 

19.1 80/20 City/Highway. 6,000 miles. A/C on 100% of the time.

 

28k miles, 23.4 mpg on an IS350 with air intake mod only to engine.

50% L.A. traffic, 50% regular city/freeway driving.

 

I don't get it i'm getting 18 -19 and i'm 50/50 plus i drive it average what's going on can it be my K&N killing so much gas. Can someone help me?

 

22.7 80/20 city/Highway
NY Traffic sucks!

 

Each time I fill up I write on the receipt my odometer reading and my tripometer reading which I reset every time I fill up. Then I later input those values into an excel spreadsheet that does two things for me, it divides the number of miles driven on that tank of gas by the gallons of gas I just put in for that fill up and it takes all those miles per gallon values and averages them. From that I get a number that is always lower than what the average miles per tank tells me in the dash display.

So where are you guys getting your numbers from, especially you 350 owners. Have you tried calculating it out yourselves or are you just reading it off that display. Personally I am not convinced that dash calculation is correct...

 

i'm bout the same range... lots of city driving.. it kills my mpg

 

For you 350 owners, I have a HARD time believing that your Lifetime avg is >23 mpg ?!? I'm thinking that the meter has been reset at least once since taking delivery, or maybe you are talking about the Tank avg. I've never reset my Lifetime avg, it's at 22.0 and I've got apprx 13k on the clock of 75/25 SoCal freeway/city driving . . . (btw my actual calculated mileage is 22.5)

 

I have 7,500 miles and my lifetime avg is 20.1, and i drive 75/25 city/highway.

 

mine is 19 mpg all city 250 awd i got it up to 30 on the tank average in my first trip on the freeway