Last post on May 29, 2013 at 3:30 PM
You are in the Lexus RX 400h
What is this discussion about?
Lexus RX 400h, Fuel Efficiency (MPG), SUV
#346 of 358 Re: Lexus 400RX Gas Mileage False Advertising [occupy]
Nov 30, 2011 (9:55 am)
What does the original sticker state ?
1) I have a 2006 RX-400h and get about the same mileage as you. My whole family says I drive like a grandma (slow), since I'm trying to get the maximum mileage.
2) I met a Toyota engineer at a football game and complained. He said Lexus is tuned for performance (it is a fast car) and not mileage. The Toyotas get better mileage with same equipment. But..I'm like you - why does it say on the sticker?
3) Disappointed. Trying to save gas, be green, encourage innovation (all with a price tag) and it falls flat.
Please continue you inquiry and post what you find ! Thanks!
#347 of 358 Re: Lexus 400RX Gas Mileage False Advertising [ronjo]
Nov 30, 2011 (11:57 am)
I posted to this forum awhile back to see what the difference was between the RX400 and the RX330 (which I have). When buying I did have the option to get a RX400 but opted against it since I already had a Prius and didnt want 2 hybrids just in case there were issues.
So that being said the RX330 averages anywhere between 13mpg and at best 22mpg! I dont remember what the sticker said but 2006 was BEFORE the reevaluation of the mpg estimates put out by the Fed. Supposedly the old tests didnt account for city driving and different conditions which lower full economy. The old setup was way off on every car, since the revamp every single car's mpg was lowered, even my Prius which was supposed to get in the 50's but really gets in the 40's. Also account for different times of year, hybrids dont do well in the cold or the extreme heat due to battery efficiency. My Prius will get in the 50's in the summer and the low 40's in the winter, sometimes in the high 30's.
So if you guys are getting 20-25mpg that's probably accurate compared to the non hybrid model. That and the hybrid adds a good 400lbs plus to the gross weight of the car.
Just my 2 cents!
#348 of 358 Re: Lexus 400RX Gas Mileage False Advertising [occupy]
Dec 29, 2011 (7:18 am)
I just bought a Certified Pre-owned 2007 Lexus RX 400H, less than a month ago. I was on getting 20 MPG, which is completely not what I was told that I would be getting (28/26 city/highway) by my salesperson before I bought the car. I believed because it was certified by Lexus (a brand known for living up to quality) that I wouldn't have to be worry about get the correct MPG.
After a couple weeks of delay, I finally got the Lexus dealership to service it to look at the MPG issue. The service folks just called and said NOTHING was wrong with it and unfortunately it depends on how you drive and warming up car/heat. I tried to ask them about an ISC reset and they said they heard nothing about that. I told them I purposely drove extremely cautiously, minimizing the use of gas and trying to coast as much as possible before I had the car serviced, but it did nothing to improve the mpg. Thus the service response to me was completely unacceptable and said the best they could do is have my salesperson call me tomorrow as he was the one to tell me repeatedly that it should get 26-28 mpg. It is unfortunate that the service people and sales people act like they work at 2 different companies. After the service person said they didn't know what MPG the car should get, I said surely Lexus should have that it print somewhere, which they conceded and then I said hypothetically that someone in the world should be able to drive the car and get the 26-28 mpg that I was told I would be getting. She finally agreed that "somebody" should be able to drive the car and get that kind of MPG.
I made a conscious decision to buy the RX 400H vs another SUV which would be less expensive as I believed I would save on gas over the next 6-8 years that would reduce the cost difference. If a car is Certified by Lexus, it should live up to the Lexus brand standards, the poor MPG is not acceptable. George, my salesperson is a really stand-up guy and a man of his word, so hopefully when he gives me a call tomorrow he'll make things right by either fixing my car or replacing it. I am hopeful Lexus will do the right thing and make things right. I'll keep everyone updated, if Lexus or anybody else wants to try to help me resolve this issue, it would be appreciated.
#349 of 358 Re: Sudden Change in Mileage [bocastephen]
Mar 09, 2012 (4:48 pm)
Thank you for this good description. After just purchasing a 2006 RX400h, you can imagine my disappointment driving on a road trip and seeing the mpg peak at 23. Mostly 22, and no different around town prior to the trip. I had done what I thought was the correct procedure according to the tsb, but I did not first drain the batteries as you state to do here. That made all the difference. Found this thread while at the hotel, and tried it the next morning... that second day of the trip, the average jumped 20%+ to over 27 mpg! Now I thoroughly love this car! It doesn't seem to make sense why this works, and is an odd quirk to the vehicle, but it certainly does make a big difference.
#350 of 358 2006 rx400h fuel economy change
Mar 10, 2012 (9:20 am)
I own a 2006 AWD RX400h, and have been the sole owner and driver. I am more of a highway or country/windy road driver as opposed to a city driver. I have never felt that I got the full benefits of owning a hybrid, but never complained with the 25-28 avg MPG (my previous vehicle was a Ford Expedition, which averaged 10-12). I am not a 'gentle' driver, but not an Indy racer either. In the past 2 months, my car has gone from the 25-28 avg to 18-20 MPG. With the 15 gal tank, where I used to avg anywhere from 320-360 miles per tank, I am lucky to get 260-280. I have not changed the tires in this time frame, I use the same gas, from the same station majority of time, which has always been the premium blend. Tire pressure is fine, and tires have been rotated at 5000 mile intervals... Nothing has changed!! I am just puzzled on the significant change in fuel economy. Yes, it is winter here in SW PA, but the temps have been quite mild compared to previous winters, and my car is garage kept the bulk of the time. Anyone have any suggestions or opinions as to this change? Thanks!
#351 of 358 Re: 2006 rx400h fuel economy change [cvav1615]
Mar 10, 2012 (9:38 am)
I would try an ISC reset procedure to reset the battery charging logic. I have copied the procedure from an earlier post. Here it is...
When you reset the ISC, you idle around and drain the battery until the engine comes on, then shut the car down. You turn off all accessories and climate control (nothing electronic should be on). Put the car in run mode (start it), press the brake pedal, put the car in drive, then while holding the brake pedal down, press the accelerator pedal down.
The car will not move or rev much, but the engine will be on and start charging. Keep the gas pedal down for 40 seconds, then release it for a few moments, then down again for 40 seconds and keep doing that 40 on/10 off etc until the battery is fully charged (all green) and the engine no longer charges or revs slightly when you press the gas pedal down. Of course you're holding the brake pedal down all the time while doing this.
Shut down, put your accessories back where you want them, then you can start up and go anytime. Learn about pulse driving to maximize your mileage going forward.
#352 of 358 Re: 2006 rx400h fuel economy change [skycaptain]
Mar 10, 2012 (10:32 am)
Thanks Luke, I will try this. Just one question, how will I know the battery is full, in the green, if I do not have the Nav screen on to show me the Hybrid system? Thanks!
#353 of 358 Re: 2006 rx400h fuel economy change [cvav1615]
Mar 11, 2012 (9:53 am)
Maybe the oil company changed the gas composition to be less polluting. Ethanol will reduce mileage.
#354 of 358 Re: 2006 rx400h fuel economy change [cvav1615]
Mar 11, 2012 (3:45 pm)
Cvav, You leave the screen on for this procedure so you see the Hybrid battery turn green....Good Luck!!....
#355 of 358 Re: Lexus 400RX Gas Mileage False AdMPG.
Oct 10, 2012 (2:31 am)
I just purchased a 2008 RX 400 H . the millage is great in city 25 mpg.
The problem with consumption is how you drive , when I am driving is 25mpg when my son driving is 19 MPG