28 MPG WooHoo
Thread Starter
Instructor
Joined: Aug 2004
Posts: 813
Likes: 76
From: Arizona
Originally Posted by PHML
28 mpg....thats unheard of for a GS? Are u running on 4 good spark plugs? LOL!!!
My integra gets 31 mpg...its a 4 cyl....1.8 liter engine.
My integra gets 31 mpg...its a 4 cyl....1.8 liter engine.
Thread Starter
Instructor
Joined: Aug 2004
Posts: 813
Likes: 76
From: Arizona
Originally Posted by chuckb
not trying to be jerky, but are you sure you calculated correctly?
I gassed up and zeroed the trip odo. Drove to the midway point, filled up and divided the amount of fuel pumped against the miles driven. I did this twice going and twice returning and got between 26 and 29MPG. I averaged the four totals and came up with 28. Is this not the proper way to calculate the average mileage?
Lead Lap
Joined: Apr 2004
Posts: 3,566
Likes: 49
From: Illinois
Originally Posted by chuckb
not trying to be jerky, but are you sure you calculated correctly?
Originally Posted by e-man
On my recent trip back from NJ, I got 27 mpg on one stretch (cruise set at around 75). Now that I'm back in Chicago, the best I've seen is 22 (and my commute to work is virtually all highway miles). It's possible to get numbers like this, but I'm pretty sure you need to drive non-stop and keep it somewhere under 2,500 rpm.
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Driver School Candidate
Joined: Apr 2004
Posts: 3
Likes: 0
From: Virginia
I routinely average 27+mpg in my GS400 on the interstate. I tend to drive between 70 and 75mph 90% of the time. I have gotten just under 29mpg going from southwestern Virginia to Richmond, which is of course 'downhill'. That said, I only get about 15-20 mpg driving in and around Richmond. Nevertheless, that is remarkable fuel efficiency for such a heavy and powerful vehicle. I'm about to install some Torquemaster spark plugs, and I hope to see a possible further improvement in mileage (and power) after that. 
Rookie
Joined: Jun 2004
Posts: 93
Likes: 0
From: Colorado
Originally Posted by rj4510
I've driven to LA from Phoenix twice in the past 3 months and got a steady 28MPG @ 80 MPH. 
Man I love this v8
Just thought I would share
Man I love this v8
Just thought I would share
I get 21.5MPG on average in the city using Shell 91 VPower vs. 18.2MPG on Costco 91.
Driver
Joined: May 2005
Posts: 132
Likes: 0
From: Texas
I promise this is not your average annual fuel economy. This is the mpg from point A to point B with very few variables. First variable - acceleration to cruising speed. Second variable - cruising speed. Third variable - decelaration from cruising speed.
According to the trip computer in my GS430 I can and have gotten 99.9 mpg between point A and point A. This was accomplished by coasting downhill with the car in neutral. Point A - crest of hill. Point B - bottom of hill.
According to the trip computer in my GS430 I can and have gotten 99.9 mpg between point A and point A. This was accomplished by coasting downhill with the car in neutral. Point A - crest of hill. Point B - bottom of hill.
If economy means that much to you guys, why not drive a Pruis or something? 
The VVT-i and ECU though on the V8 work to keep fuel consumption to a minimum when power demands are low (i.e., you're cruising, decelerating or stopped) and economy goes out the window when you want power, to maximize power. That's the trade-off.
So to get max. mileage on the GS V8, you HAVE to drive with VERY little variation in speed.
The VVT-i and ECU though on the V8 work to keep fuel consumption to a minimum when power demands are low (i.e., you're cruising, decelerating or stopped) and economy goes out the window when you want power, to maximize power. That's the trade-off.
So to get max. mileage on the GS V8, you HAVE to drive with VERY little variation in speed.
Driver
Joined: May 2005
Posts: 132
Likes: 0
From: Texas
Originally Posted by bitkahuna
If economy means that much to you guys, why not drive a Pruis or something?
The VVT-i and ECU though on the V8 work to keep fuel consumption to a minimum when power demands are low (i.e., you're cruising, decelerating or stopped) and economy goes out the window when you want power, to maximize power. That's the trade-off.
So to get max. mileage on the GS V8, you HAVE to drive with VERY little variation in speed.
The VVT-i and ECU though on the V8 work to keep fuel consumption to a minimum when power demands are low (i.e., you're cruising, decelerating or stopped) and economy goes out the window when you want power, to maximize power. That's the trade-off.
So to get max. mileage on the GS V8, you HAVE to drive with VERY little variation in speed.
Thread Starter
Instructor
Joined: Aug 2004
Posts: 813
Likes: 76
From: Arizona
When I first posted this message, I thought others would share my excitement about Lexus building a car well enough to have power when you need it and give you fuel economy when possible. Other makers are very capable of producing powerful V8s that go ***** out. However, they tend to get crappy gas mileage regardless of driving conditions.
I don't see why we can't discuss gas mileage on a forum such as this, just because some of us drive V8s. Besides, If I bought a Prius and discovered my mileage to be less than promised , I would be complaining...as have so many Prius owners. If they turn on the AC, they lose mileage, if they drive on the highway, they lose mileage. Perhaps someone should suggest they buy a real car if their mileage isn't any higher than the upper 30s
I don't see why we can't discuss gas mileage on a forum such as this, just because some of us drive V8s. Besides, If I bought a Prius and discovered my mileage to be less than promised , I would be complaining...as have so many Prius owners. If they turn on the AC, they lose mileage, if they drive on the highway, they lose mileage. Perhaps someone should suggest they buy a real car if their mileage isn't any higher than the upper 30s