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Gas mileage...good-bad (The Mother thread)

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Old 08-20-13, 08:18 AM   #376
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i get ~17 mi/gal (or 14L/100km in Canada) running a blower at 7psi
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Old 08-23-13, 02:09 PM   #377
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I just have to keep reminding myself that while the MPG blows on this car, I've been driving it for 2.5 years now. Every day for the first year, I kept worrying about the car breaking me financially.

It hasn't happened yet. I had an opportunity to drive a 2009 Corolla back from Vegas a couple weeks back(about a 2 hour drive, uphill). Had the base model w/ 4 speed auto. The thing did great on fuel, but the engine was noisy and I had to keep my foot into the pedal to maintain 80 mph on the freeway. My LS400 does that drive with the cruise on at 75-80 and never kicks down into 3rd.
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Old 01-27-14, 08:21 AM   #378
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First of all, I know I am resurrecting a thread but I had to share this with you guys. Yesterday, I made a trip from Pensacola, FL to Nashville, TN in my LS400. I stopped in Brewton, AL at the Walmart to fill up a full tank of 89 octane (mid grade) and reset my trip meter while I was at it. Upon arriving in Nashville, I was SHOCKED to find that the Lexus was able to achieve 31.8MPG!!! I believe the reason this was possible is I had my cruise control set on ~62MPH the entire ~390 miles. Nothing special is done to the car, its a 97 LS with around 285,000 miles, I have a K&N air filter. Has anyone heard anything about anyone getting this good of mpg with a LS before? It seriously got better gas mileage than the Chevy Sonic I drove down to Pensacola two weeks ago.

Last edited by BradFL; 01-27-14 at 08:24 AM..
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Old 04-29-14, 04:20 AM   #379
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If you don't check your speedometer with a GPS to verify actual miles driven and actual speed how can you even estimate mpg? Never trust the info from the info center unless you have verified it is correct. I have seen the speed indicated off by 5-10% so your actual miles driven will reflect that. Fill up, mark the mileage down, at the next fill up note miles driven and the gas you just put in the tank. Divide the gallons into the miles, adjust if you have speedo error % and now you have true MPG! Tire wear, inflation, tire brand, and general wear will affect your speedo reading.
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Old 04-29-14, 06:54 AM   #380
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I usually get 25 mpg hwy with cruise on. in town i get any where from 7mpg to 17 mpg depending on my brick.. i mean foot.

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Old 04-29-14, 11:34 AM   #381
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Originally Posted by BrettJacks View Post
Got an amazing 13.6 today. That's a 3 mpg improvement. I attribute it mostly to my AC dying. Took quite a load off the engine.

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There is something VERY wrong with those numbers. I get 30% better than that driving in the city!

Also the AC/bad mileage thing is just a myth... sure it MAY take 1mpg off but not much more.
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Old 05-23-14, 07:45 AM   #382
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im right at 23-24 with cruise on at 70-75/.
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Old 05-23-14, 12:31 PM   #383
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Originally Posted by sayow View Post
There is something VERY wrong with those numbers. I get 30% better than that driving in the city!

Also the AC/bad mileage thing is just a myth... sure it MAY take 1mpg off but not much more.
I agree... there is something wrong with those numbers... my Tundra does better than that, city driving.
1. 2004 Mercury Metallic LS 430 - 51K and counting...slowly
2. 2002 Millennium Silver LS 430 - 125K
3. 2004 Toyota Tundra...109K
4. 2001 Toyota 4Runner... the previous daily driver...
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Old 05-23-14, 02:05 PM   #384
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With ours and AC on, I notice about a 3-5% drop in overall tank with a mix of driving. Not significant relative to the comfort and keeping the inside of the car clean.

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Old 06-23-14, 03:14 PM   #385
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97 LS400 150k miles

Every time I fill up I use 91 octane like I should and I get about 23.4 - 24.6 MPG with an even 50/50 city/highway mix. I was thinking about adding an intake to further improve my gas consumption.
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Old 07-17-14, 08:39 PM   #386
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Default 1996 LS400 Gas Mileage

Hey all. Due to a budgeting mishap on my bi-weekly checks I ended up having to let my car get to E for the first time in my life. I have religiously since I was 16 years old never let any of my 6 cars get below a quarter tank. And normally I fill up at a half tank.

Anyways, on one tank of Shell V-Power premium I got 530 miles and when I filled up I put in $76 and 19.2 gallons.

Am I right in assuming this car has a 22 gallon tank? If so why did the light come on right at 500 miles with more than 3 gallons left?

So, I managed to get 27 mpg with my non vvt-i which I think is freaking great for a V8. Not to mention I do a fair amount of stop and go. I am constantly amazed at this car.
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Old 07-17-14, 08:39 PM

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