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?

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.

SILENTM

2006 GS300 mostly highway i get 26 mpg (calculated)

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.

LoveThatV8

iTrader: (1)

17 city with sport shift... Bounces to 23 - 25 highway with auto shift

voleduy

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.

voleduy

Did you use it and see the improvements afterward?

Enelson509

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.

vincewchan

iTrader: (1)

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.

voleduy

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?

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?

irishger

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.

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

Steve2424

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.

pman6

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