Notices
GS - 3rd Gen (2006-2011) Discussion about the 2006+ model GS300, GS350, GS430, GS450H and GS460

Mpg?

Thread Tools
 
Search this Thread
 
Old Nov 16, 2014 | 08:21 AM
  #1  
voleduy's Avatar
voleduy
Thread Starter
Pole Position
 
Joined: May 2009
Posts: 248
Likes: 0
From: Texas
Default Mpg?

What's your MPG average on your GS? Please share.

On the paper stating 19 city - 26 hway so the average should be between but my average mpg so far below 17mpg most of the time. Any thoughts?
Reply
Old Nov 16, 2014 | 08:26 AM
  #2  
Gotcha350's Avatar
Gotcha350
Lead Lap
 
Joined: Jun 2008
Posts: 589
Likes: 14
From: LA
Default

Originally Posted by voleduy
What's your MPG average on your GS? Please share.

On the paper stating 19 city - 26 hway so the average should be between but my average mpg so far below 17mpg most of the time. Any thoughts?
Model? 300, 350, 430, 460? I don't recall the MPG of the top of my head for each of these but I average around 21...but it depends on how and where you do most of your driving...in all city I've been at 17 too.
Reply
Old Nov 16, 2014 | 08:29 AM
  #3  
SILENTM's Avatar
SILENTM
Pole Position
 
Joined: Apr 2014
Posts: 284
Likes: 20
From: CA
Default

2006 GS300 mostly highway i get 26 mpg (calculated)
Reply
Old Nov 16, 2014 | 09:15 AM
  #4  
Ironman50's Avatar
Ironman50
Intermediate
10 Year Member
Liked
Loved
Community Favorite
 
Joined: Aug 2011
Posts: 413
Likes: 31
From: KY
Default

19 - 20 city

25-30 hwy......Last week driving 4 hrs on highway doing 70 - 75 averaged 28 mpg

Lucas Oil company makes a gas additive that helps with gas mileage.
Reply
Old Nov 16, 2014 | 09:38 AM
  #5  
LoveThatV8's Avatar
LoveThatV8
Pole Position
iTrader: (1)
 
Joined: Aug 2014
Posts: 302
Likes: 4
From: SoCal, Northridge 818,310,323,626
Default

17 city with sport shift... Bounces to 23 - 25 highway with auto shift
Reply
Old Nov 16, 2014 | 09:44 AM
  #6  
voleduy's Avatar
voleduy
Thread Starter
Pole Position
 
Joined: May 2009
Posts: 248
Likes: 0
From: Texas
Default

Originally Posted by Gotcha350
Model? 300, 350, 430, 460? I don't recall the MPG of the top of my head for each of these but I average around 21...but it depends on how and where you do most of your driving...in all city I've been at 17 too.

Mine is 2011 - gs350. The best I can get so far is 17 city. Haven't driven long on highway yet cuz just bought the car for few days.
Reply
Old Nov 16, 2014 | 09:49 AM
  #7  
voleduy's Avatar
voleduy
Thread Starter
Pole Position
 
Joined: May 2009
Posts: 248
Likes: 0
From: Texas
Default

Originally Posted by Ironman50
19 - 20 city

25-30 hwy......Last week driving 4 hrs on highway doing 70 - 75 averaged 28 mpg

Lucas Oil company makes a gas additive that helps with gas mileage.
Did you use it and see the improvements afterward?
Reply
Old Nov 16, 2014 | 12:56 PM
  #8  
Enelson509's Avatar
Enelson509
Driver School Candidate
 
Joined: Nov 2014
Posts: 2
Likes: 0
From: Washington
Default

With my '09 350 I see an average of 15-16 mpg in city with lots of short tips and hills. Long highway trips are 26-28 mpg. I always run premium fuel but have heard that mileage is worse with mid-grade.
Reply
ClubLexus Stories

Celebrating Lexus & Toyota from Around the Globe

story-0

10 Lexus Designs That Have Aged Like Fine Wine

 Verdad Gallardo
story-1

8 Tips for Improving Your Hybrid or Plug-in Hybrid's Efficiency!

 Michael S. Palmer
story-2

10 Best Lexus Models No One Remembers

 Joe Kucinski
story-3

TRD Off-Road Premium: Best 2026 4Runner, Except This One Thing

 Michael S. Palmer
story-4

Top 10 Lexus & Toyotas to Drive Before You Die!

 Joe Kucinski
story-5

Top 10 Lexus/Toyotas With The LEAST 5-Year Depreciation

 Joe Kucinski
story-6

Lexus LC500 Convertible Auction: A Preview of Rising Values?

 Brett Foote
story-7

GX 550 vs TX 550: Best 3-Row Luxury Lexus Family Hauler

 Michael S. Palmer
story-8

9 Best Lexus Models You Can Buy for Half Price (And 1 You Shouldn't!)

 Joe Kucinski
story-9

2026 Lexus NX Buyer's Guide: Models, Features, Prices & More!

 Brett Foote
Old Nov 16, 2014 | 03:01 PM
  #9  
vincewchan's Avatar
vincewchan
Driver School Candidate
iTrader: (1)
 
Joined: Apr 2009
Posts: 37
Likes: 5
From: CA
Default

How many miles do you have on the GS?

I changed my spark plugs and sea foamed the GS 2 months ago and I went from ~17mpg city to about almost ~21mpg city.

Also check your tires and make sure they are properly inflated.
Reply
Old Nov 16, 2014 | 04:07 PM
  #10  
voleduy's Avatar
voleduy
Thread Starter
Pole Position
 
Joined: May 2009
Posts: 248
Likes: 0
From: Texas
Default

Originally Posted by vincewchan
How many miles do you have on the GS?

I changed my spark plugs and sea foamed the GS 2 months ago and I went from ~17mpg city to about almost ~21mpg city.

Also check your tires and make sure they are properly inflated.
I have 38k miles on mine. I bought it certified so all tires are new. Driving on highway today and got 18.5 mpg. That's the big difference from what y'all have been experiencing.
Is there a way to improve it?
Reply
Old Nov 16, 2014 | 05:04 PM
  #11  
pman6's Avatar
pman6
Racer
10 Year Member
 
Joined: Aug 2012
Posts: 1,939
Likes: 20
From: CALIFORNIA
Default

something's not right. are you lead foot?

How are you testing? Is the highway flat? how far did you drive?

It's hard to believe you're getting 17 in the city, and 18 hwy. There should be a big difference between city and hwy.

What is your engine rpm on the hwy?
Reply
Old Nov 16, 2014 | 05:14 PM
  #12  
irishger's Avatar
irishger
Driver School Candidate
 
Joined: Nov 2013
Posts: 14
Likes: 0
From: new york
Default

On long drives, If I take it handy, with cruise control @ 60 - 65 mph I can get up to 37mpg. Avg city driving is around 23mpg. Gs300.
Reply
Old Nov 16, 2014 | 05:22 PM
  #13  
voleduy's Avatar
voleduy
Thread Starter
Pole Position
 
Joined: May 2009
Posts: 248
Likes: 0
From: Texas
Default

Originally Posted by pman6
something's not right. are you lead foot?

How are you testing? Is the highway flat? how far did you drive?

It's hard to believe you're getting 17 in the city, and 18 hwy. There should be a big difference between city and hwy.

What is your engine rpm on the hwy?
That's actually my concern since I expected the mpg stays somewhere 19-26 combined.

The highway is flat, my foot on the gas pedal was consistent and stable. Drive for about 25 minutes. Didn't pay attention to the rpm thou. Just had another 25 minutes highway drive and it came up to 19.2 now.

I'm not sure why and how it's calculated thou. By the way, I just picked up my GS for only 2 days from the dealership.

I'm not sure
Reply
Old Nov 16, 2014 | 05:41 PM
  #14  
Steve2424's Avatar
Steve2424
Driver
 
Joined: Apr 2014
Posts: 189
Likes: 1
From: New York
Default

Originally Posted by voleduy
That's actually my concern since I expected the mpg stays somewhere 19-26 combined.

The highway is flat, my foot on the gas pedal was consistent and stable. Drive for about 25 minutes. Didn't pay attention to the rpm thou. Just had another 25 minutes highway drive and it came up to 19.2 now.

I'm not sure why and how it's calculated thou. By the way, I just picked up my GS for only 2 days from the dealership.

I'm not sure

I usually leave the MPG meter on the cluster to get an idea on how much pressure I'm applying to the gas pedal. In city driving I get anywhere from 16-19mpg, and on the highway I've seen an average of 24-26mpg -- sometimes as high as 29-30.
Reply
Old Nov 16, 2014 | 06:55 PM
  #15  
pman6's Avatar
pman6
Racer
10 Year Member
 
Joined: Aug 2012
Posts: 1,939
Likes: 20
From: CALIFORNIA
Default

you need to test it with cruise control. Cruise control usually sips gas better than you do on flat road.

On flat road with cruise, the instantaneous mpg meter should show ~25-30
Reply



All times are GMT -7. The time now is 04:40 AM.

story-0
10 Lexus Designs That Have Aged Like Fine Wine

Slideshow: Some luxury cars chase trends, but these Lexus models look better now than they did when they first rolled into showrooms.

By Verdad Gallardo | 2026-05-06 17:58:29


VIEW MORE
story-1
8 Tips for Improving Your Hybrid or Plug-in Hybrid's Efficiency!

Slideshow: How to Get the Best Fuel Economy with a Hybrid and Plug-In Hybrid!

By Michael S. Palmer | 2026-05-05 20:54:44


VIEW MORE
story-2
10 Best Lexus Models No One Remembers

Slideshow: 10 best Lexus models no one remembers.

By Joe Kucinski | 2026-05-05 17:33:28


VIEW MORE
story-3
TRD Off-Road Premium: Best 2026 4Runner, Except This One Thing

Slideshow: diving into 4Runner TRD Off-Road Premium's pricing, performance, fuel economy, features, and amenities!

By Michael S. Palmer | 2026-04-23 13:09:18


VIEW MORE
story-4
Top 10 Lexus & Toyotas to Drive Before You Die!

Slideshow: the 10 Lexus and Toyota vehicles you need to drive before you die.

By Joe Kucinski | 2026-04-23 10:34:24


VIEW MORE
story-5
Top 10 Lexus/Toyotas With The LEAST 5-Year Depreciation

Slideshow: Top 10 Lexus/Toyota models with the lowest 5-year depreciation rate.

By Joe Kucinski | 2026-04-08 12:19:06


VIEW MORE
story-6
Lexus LC500 Convertible Auction: A Preview of Rising Values?

The LC hasn't even disappeared from the Lexus lineup yet, and we're already seeing signs of an explosive market.

By Brett Foote | 2026-04-06 09:25:02


VIEW MORE
story-7
GX 550 vs TX 550: Best 3-Row Luxury Lexus Family Hauler

Slideshow: comparing the pricings, specs, power, fuel economy, fun-factor, and features of the GX 550 Luxury+ and TX 550h+ Luxury.

By Michael S. Palmer | 2026-03-19 13:44:11


VIEW MORE
story-8
9 Best Lexus Models You Can Buy for Half Price (And 1 You Shouldn't!)

Slideshow: 9 best Lexus models you can buy for half price and 1 you should avoid

By Joe Kucinski | 2026-03-19 12:01:07


VIEW MORE
story-9
2026 Lexus NX Buyer's Guide: Models, Features, Prices & More!

Here's everything you need to know about the latest NX.

By Brett Foote | 2026-03-19 11:56:59


VIEW MORE