13-15mpg on 2001 LS430. I'm in supercar territory with those numbers.

 

and you look just as good getting that gas mileage too

 

Well,
Here's a report on my 99 LS400 ~ 49K miles (which I've only had for three weeks).
Keep in mind that this vehicle I bought is a cert. pre-owned, so the dealer has just done a 50K mile service, and has changed all fluids, hoses, belts, battery, even new rims, and with under 50K, these engines are just starting to break in
In city driving here in Houston, (mixed freeway/street), I am getting 19 MPG (manually calculated), while the computer shows me a tank average of 19.7 MPG (pretty darn close).
This makes me very happy, as my last vehicle was getting around 12 MPG.
Can't wait to take a trip and see how much better mileage I can get on the highway, and I'm guessing that 25 or 26 MPG is very plausible.

Tex

 

After having changed spark plugs to Bosch Platinum +4, K&N Filter, proper front alignment, 2 new tyres, front brake pads, synthetic oil change, transmission oil change, and rear differential oil change, I managed to get a whopping almost 26 mpg out of my 1992 Lexus with 185,000 miles. Unfortunately, all the changes were done during the same week, and it is impossible for me to tell what changes led to the best improvement. The acceleration is greatly improved as well, and so is the handling. I am finally pleased with the performance of the car.

 

I am getting a consistent 23-24mpg tanks after tanks on mostly highway driving at an average of ~75mph on my 91LS and with regular unleaded gas in So. Cal. Gasoline here are oxygenated which reduces gas mileage. I haven't done any tune-up since I bought the car and don't know when it last tune-up was, but I am very pleased with the mileage I am getting.

 

93 LS 98K miles

I get 19.1 mpg with new rotors, caps, wires, plugs and pcv valve, oil change, transmission fluid just changed and timing belt with water pump new, new power steering pump, new tires running 93 Octane. I drive 12 miles on the interstate to work and 12 miles back. And that is about it. Use my 99 ES in town to run erands.

just my 2¢

 

how much did it run you to change your tranny and diff oil ? and what kind used?

because i'm planning to do it soon for my 91

 

How are you calculating gas mileage?

This is what I do and I rarely see anything above 18MPG. I do drive quite hard though and that has a lot to do with it.

1. Fill up gas tank
2. reset trip counter to 0
3. drive to (usually 1/8) tank full
4. Refill gas - let pump stop then add a little more gas
5. Count gallons filled from pump, usually about 17.5 gallons
6. divide miles on counter by gallons filled from the pump

= MPG.

 

Transmission oil: $30 - Toyota Transmission Type 4 fluid
Differential oil: $15 - Mobil 1 Synthetic 75W-90

 

Fill up gas tank, + 1 squirt
Reset trip meter to zero
Drive 375 totally highway miles at 70-75 mph, with 1 stop on absolutely flat land on the IN, OH, PA turnpikes.
Refill tank + 1 squirt = 14.5 gallons
Divide 375 by 14.5 = 25.86 mpg.
Repeat procedure in other direction after 2 days

Repeat entire round trip procedure next weekend.

Have done it over 30 times this year. Very consistently. 24 mpg initially, now 26 mpg. No questions asked. The thing is I hold steady speeds on flat land.

 

On my 94 LS I just hit 20 mpg for the first time on a trip from LA to the Bay.. The car has 123K miles on it, and I just got new tires. I've never seen anything remotely close to 26 mpg... if only! I usually see 18 average on a tank and that is with mostly freeway driving along with some city.

 

This is the same thing I used to calculate my 19.1 mpg.

Did you know that if you fill up when the weather is cool you will get more gas for your money? You actually pay for gas by weight not amount and it is lighter when the weather is cooler like in the early morning or late evening.

 

how much was labor?

 

I paid $160 for lube and trans oil change at dealer.

 

I'm getting about 17mpg with a mix of city and short amounts of freeway driving. I usually fill up when I've got about 300 miles from the tank, and I calculate just as Lvangundy does. I was wondering what type of differential oil to use, got it now, good info here.
Earl!