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Lexus RX 400h - MPG-Real World Numbers

311 messages,  Last post on Jul 08, 2009 at 3:52 PM

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What is this discussion about? Lexus RX 400h, Fuel Efficiency (MPG), SUV

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#304 of 311 just bought the 2009 400h fwd by morna1953 Sep 23, 2008 (6:51 am)
I bought the hybrid 400 to replace a five year old 330 that I absolutely loved, and I love this vehicle even more. I love the constant feedback on gas mileage that I get from the computer, as it is teaching me to drive more efficiently to save fuel. Most (about 90%) of my driving is in town, and so far I am averaging 28.4 mpg overall. I can't think of anything I would change in this vehicle. My husband and I and two dogs went on a 3 week, 4500 mile road trip in the 330 this past summer and got about 27 mpg, and we can hardly wait to do a road trip in the 400h.
#305 of 311 by junkss00 Sep 24, 2008 (11:00 am)
Hey all,   So i'm thinking of getting a used hybrid and I heard that you can go on battery alone up to 30mph. So if my work commute is less than 2 miles local on relatively flat road, does that mean i can run on electric forever???   Probably not because I guess the battery will eventually drain. But i figure with some regenerative braking, it can go for awhile w/o filling up. I have no experience with hybrids, so I'm clueless.   What kind of MPG can I expect if I use the hybrid solely for work commute and keep it under 30mph?   Also, are the maintenance cost higher than a regular 350? Wouldn't the battery die eventually and have to be replaced? I would expect this to be quite expensive.   thanks Replies to this message: lansdownemike (Nov 30, 2008 7:26 am)
#306 of 311 Re: [junkss00] by lansdownemike Nov 30, 2008 (7:26 am)
Replying to: junkss00 (Sep 24, 2008 11:00 am) I think your biggest problem would be that during the warm-up period, 3-8 minutes in my part of the US (Northern VA), only the engine is used for propulsion and it sounds like you'd already be at work when the electric motor(s) kicked in. You'd get worse mileage than specified if that is your typical usage pattern. Sorry 'bout that.
#307 of 311 Took the leap with a used 2006 AWD by likemycars Apr 27, 2009 (6:08 pm)
I just purchased an RX 400h off lease with very low miles, and I'm really pleased so far with the car, and the mileage. I'm averaging about 27 mpg in very mixed driving, about 20% slow city driving, 40% 30-50mph urban, and 40% highway at 65mph. Per other posts here, a couple of very short trips to the store, where the car didn't get a chance to warm up, has pulled the mileage down. I've had some 30 mpg days when I didn't get on the highway at all. Highway driving seems to yield about 27-28 mpg. It's an awesome car considering all it can do and still pull that kind of mileage. Replies to this message: dmbflorida (Apr 27, 2009 8:58 pm)
#308 of 311 Re: Took the leap with a used 2006 AWD [likemycars] by dmbflorida Apr 27, 2009 (8:58 pm)
Replying to: likemycars (Apr 27, 2009 6:08 pm) I am glad you like the 400h 2006. Both my daughter and I have these SUVs and average in town, about 27 mpg....she often gets worse fuel economy than I do because she runs the air conditioning while the car is stopped in the driveway for a while....We live in deep SW Florida where it is hot and she does not want to get too hot. We get better mileage on the highway. Neither of us have had any significant problems with these cars although maintenance and a few repairs are more expensive than at the dealerships of cheaper cars. So far, we use the Lexus dealership service dept where we bought the cars and it is excellent. I changed from a 2004 Prius because I wanted a bigger, heavier car that was a hybrid. Of course, the Prius was excellent, too, for its features and tremendously good fuel economy. I am proud of my 400h...it still looks great. btw, the RX330 that is the non-hybrid version, 2006, by comparison was getting only about 12 mpg average in town driving. I compared notes with a few other owners.
#309 of 311 3 years old Lexus RX400h MPG by alexfe Jul 08, 2009 (9:55 am)
I've got my RX-400h 2006 just a month ago, and have got 23.5 MPG average for a long trip (Seattle->San Francisco->San Diego->Las Vegas->Yellowstone->Seattle). Before Lexus, I had Prius 2007, and for the first few months I had pretty good MPG about 45-50 average. but then I went to 40, or even 38. I understand that my driving habits were changed significantly over the time, and the car itself is getting older and not so performant as before. Anyway, my question is: does someone experience the same MPG degradation over the time? Replies to this message: nigh (Jul 08, 2009 12:37 pm)
#310 of 311 Re: 3 years old Lexus RX400h MPG [alexfe] by nigh Jul 08, 2009 (12:37 pm)
Replying to: alexfe (Jul 08, 2009 9:55 am) There are many factors influencing the mpg on the 400h, ie, weather, terrain, temperature, etc. There have been times that we got 31.3 mpg on a long trip and other times 25. We average about 26mpg most of the time now in Maryland. I usually do not do as well as my husband but for the most part am satisfied with the 26. It is still a pleasure to drive and we still LOVE it.
#311 of 311 26 mpg city, with A/C, better on highway by dmbflorida Jul 08, 2009 (3:52 pm)
I bought a new 2006 400h hybrid over four years ago as did my daughter (both are front wheel drive and this gets better fuel eco than AWD). We live in hot SW Florida so A/C is on most of the time. I get about 26 mpg in city, slightly better on highway. She gets slightly less mpg than I do but she is not as conservative as I am in driving habits plus she frequently leaves the A/C on in the driveway or queue in a 'drive through' place. She has twice the odometer reading compared to me. I traded in a 2004 Prius that I loved but it was not as comfortable or as safe as the Lexus RX 400h which is superior in most features. I personally do not drive a lot and plan to keep my 400h for many years. I recommend this 2006 car highly but I do not know anything about the new models.

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