zippinbye

I'm sure fuel economy querys have been beaten to death on this forum. Hopefully this is a refreshing and simple request. I'd like to know what MPG could be expected on the freeway with cruise control locked on 70 mph in a non-AWD LS460. Thank you.

aaauae

i get 30-33 mpg on straight flat paved roads on 80mph , 70 should be a little more

DJWLDW

At 70 mph I get 30 - 30.5 mpg all day. At 75-76 mph which is about my high cruise comfort zone I get 28.5 - 29 mpg

Dennis

greg3852

Agreed. At 70, I get 30 - 30.5. sometimes 31

enoch861

Between 70-80 I get around 30-31 on relatively flat pavement. It get's a bit sketchy once hills are thrown into the curve. But on a typical 100 mile cruise at 75-80 I get around 26-28 due to the cold. Otherwise in the summer with warmer air I get around 28-30 depending on the prevalence of hills.
You can probably do better if you self modulate the throttle too.

zippinbye

Wow, those are amazing numbers. I haven't seen mention of the drag coefficient, but I recall the LS 430 was remarkably slick, especially for a large sedan. Low to mid 30s in a 380 hp luxury ride virtually defies the laws of physics. I've been driving my daughter's 2002 V-6 Avalon lately. It pulls 26 to 28 running on the freeway around 70 mph.

My follow-up question is not intended to cast doubt on the stated figures, it's matter of curiousity: how accurate is the computer versus hand calculations for mpg? My LS 430 was scary-accurate, always within three tenths, which I'd guess is meaningless given full technique margin of error.

Anyhow, I have renewed rationalization for buying a 460: "efficient commuter." Guess I can cross many econoboxes off my list of next vehicles! Thanks for the feedback.

enoch861

I was also shocked with how efficient the car is at speed.
Just remember, if you're doing any stop and go driving, kiss that good mileage away because that's when the V8ness of the V8 kicks in.

I've found mine to be pretty spot on. I don't remember the margin of error though I'll have to go back and dig up some numbers.

CRowe14

If I recall correctly, I read that its about 1-2 mpg off.
But that figure was in relation to the average all-around mpg per tank of fuel.
So to arrive at that figure within those given parameters (mpg@70mph), im guessing it would near the same if not dead on.
Also, I believe the drag coefficient of the LS 460 was better when the '07 design was introduced.
What I find interesting on my car (and its quite visual because my car is a darker color), is that when it rains and the water/dirt mixture dries up on the cars body surface, you can actually see the path at which the air flows against the car as it powers forward.
Up front is typically darker, but as you view and move along the hood, up the front windshield and top of the car, and especially the sides of the car, the lines become fewer and faint, which can be believed to show just how well the car handles negative force due to its physical exterior make-up.

greg3852

I recently went on a trip to South Carolina and averaged over 600 miles per tank. One was around 612 and that was at 75-80mph. This thing is a beast on the highway.

RayLS

About 29 mpg on stock wheels travelling from LA to LV at 75-80 mph with 4 total occupants plus luggage.

NickTee

You'd be surprised. Sometimes the optimal cruising RPM is slightly higher, which means that you actually get better gas mileage at a higher speed until a certain point. For example: my Monaro actually had better gas mileage at 86mph than it did at 70 mph. At 70-71 mph I would get 28-28.5 mpg, while I got 30.5-31mpg at 85-86.
Your results will vary based on different cars, but don't automatically assume lower speed always means better gas mileage.

Doublebase

I get around 30mpg...when I go 80 it doesn't go down much...if at all. The car gets better gas mileage overall than my wife's Honda CRV, and that's a four cylinder. I drive mine 500-700 miles a week, I wouldn't do that if it wasn't great on gas.

hms09

29-30 at 70-79 mph.2007

sktn77a

iTrader: (2)

High 20's. Yes, you can get over 30, but you might want to keep your mind on the road.

CJITTY

Tons of these threads out there. I go about 80mph on road trips and average 23mpg tops in my LS600 hybrid