Helterran

Whats an good way to save gas on this car? 2014 LEXUS IS 350 F Sport

been doing some tests and it seems that I can only get the following..
Drive with 100% Eco Mode.. 318 miles estimate apx 22.7 MPG
Drive with 100% Normal mode... 337 miles estimate apx 26.67 MPG

I basically fill up a tank once every week.. as my work is 52 miles round trip.. with possibility 20 miles a day on highways.

ultran00b8

Numbers look pretty good to me since your commute is 40% highway.

SonyHome

I drive 80% - 90% highway for my commute (mostly normal mode with bit of sport/sport+ to merge in) and best MPG on a full tank on my car since January is 24 MPG. I think this will get little better as MN weather gets warmer but I don't see it going much higher than 26 MPG.

Im2bz2p345

Hello Helterran,

First off, welcome to the forums! Glad to see a new IS owner here. ClubLexus has a ton of useful information and I'm sure you will find out quickly that about 90% of the topics you think of have been discussed immensely.

If you click on "Search this Forum" link from the main IS Third Generation page (https://www.clublexus.com/forums/is-...eneration-249/), you'll be able to get to topics that were previously started and you can read/give your input there.

In relation to this topic about gas milesage, we have had three large topics on this with some comments being fairly recent:

1) Bad MPG is350 f sport: https://www.clublexus.com/forums/is-...0-f-sport.html

2) Gas Mileage - Different Modes: https://www.clublexus.com/forums/is-...ent-modes.html

3) What kind of MPG #'s are you guys getting? https://www.clublexus.com/forums/is-...s-getting.html

I came across these all within a few seconds of typing "mpg" in the search box from the main IS (3G) page.

I think your question/topic might fit best with the 2nd link "Gas Mileage - Different Modes" - I would kindly request the mods to merge these topics.

Hope this helps,

~ Im2bz2p345

jay631987

I drive mostly in Sport+ mode and i get about 320 gallons to the tank. The funny thing is I tried replicated my style of driving with the other modes...I get less than 1 MPG improvement so it is not worth it. What I find weird is when i get that low gas light with 12 miles left in the tank...a full tank fill up is only 15 gallons...not 17.4 ...anybody know why?

toyotatom

Call the extra 2 gallons your safe zone, I filled mine the other day with 12 miles left and it took 15.2 gallons

jay631987

interesting...so you can go another 50 miles before you go truly empty...

Helterran

thank you all for your responses.. I will take a look it and see what i can do. =)

Kevin350

Yup I usually lag for another 15-20 miles after the light

anhzie

lol idk why u get over 20mpg...everytime i fillup full tank i got 19mpg and under 290miles using normal mode all time

Slust

I posted this in another thread...

Gas mileage appears to be the same as the 2IS. I averaged 25-27mpg in a IS250 with very spirited driving. The 3IS250 loaner I had for a month (with 7k miles on it) gave me the same gas mileage ...well except for the tank I tried 86 octane on it - bad choice.

I currently drive a 3IS 350 and I average 22-23mpg with spirited driving in Sport mode 100% of the time with 50/50 split of freeway and city driving. My best tank was 25.2mpg driving in ECO and driving like a complete pansy (trying to avoid going over 2k rpm) - again 50/50 freeway/city split. My friend with a 2IS 350 said his 350 started off at 19/20mpg but now averages 25-27 and he only drives in Power mode.

I'm willing to guess we will see our 3IS improve over time. I don't think anyone has even had their 3IS a full year yet.

Nigel-JDMParts

iTrader: (74)

Once I changed the spark plug, the gas mileage goes up lol
Is weird, and I can't explain it as well.

jay631987

I was getting that before I broken in the car....like I mentioned before I drive exclusively on S+ mode but I dont drive aggressive most of the time either.

drive90

My rolling average for my IS 350 F-Sport is 16.5 MPG with 90% city driving over the past 3000 miles. Mostly in normal mode, spirited driving. Sucks.

albino1

I've driver over 11,000 miles, always in Eco, rarely in traffic, and I never race around, and yet the only time I've seen over 23mpg was during long drives through the desert from LA to Vegas or Phoenix. Other than that I average around 21, with occasional swings up to 22.5. What am I doing wrong?