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Did you have your fuel system flushed? My Rx400 took a hit with gas mileage. I had the fuel system flushed and am back at 28 to 30 mpg.

Have the dealer check to A/C discharge tube under the car. It may not be allowing the condinsation to drip out on to the ground.

It should be in the small tool kit next to your spear tire.

I currently have Goodyear Assurance ConforTred Touring tires on my RX400h. I have had no issues with them. I have been on snow, ice, and wet pavement and the handle great IMHO.

Before starting the vehicle, just set the parking brake. The daytime running light should not turn-on until the brake is released.

One must remember the the Hybrid Batterys work best between 70 and 80 degrees. So using the vehicle A/C helps regulates the battery temp that is why the vehicle has vents inside and not outside as the first Prius did.

There is an air intake vent under

the rear seats to cooling the hybrid

battery (traction battery). If the

vent becomes blocked, the hybrid

battery may overheat, leading to a

reduction in hybrid battery output

You need to also check your fuel. A lot of States require all grades of gas to contain 10% Ethanol from October to April. If your gas contains Ethanol, then you will see a decrease in mileage, as Ethanol has less energy then regular gas.

Buk is absolutely correct. The only way to achieve maximum mileage on these vehicles (ANY vehicle) is to drive using all the regular gas-saving techniques. About the only difference is that under certain circumstances (level road, low speed, slow acceleration) you can coax them into not firing up the ICE. I've also seen my mpg go UP while stuck in traffic jams. And, colder temps do affect your mileage...my winter mileage is always at least one mpg less.

BTW, judging your mileage by using the "most miles I could drive" readout (if that's what you're doing) is a new one on me. I keep my '08 gauge display on average mpg all the time.

Lastly, at 1K miles, your vehicle is still breaking in. You probably won't achieve maximum mileage potential until it has passed 5K.

GOOD LUCK!

Hi friends

I was going through a Prius service manual that recommended 87Octane petrol (Gas) as the recommended fuel. It also mentioned that 95Octane could beep a dash warning occasionally. It could be the same for RX since it has the same technology in a larger scale. Has anyone analysed the long term saving vs costs such as fuel system cleanups and mileage etc. I am sure there are many threads on this but I am wondering whether there is a long term impact analysis.

Regards

Arjuna

The owners manual states 91 Octane. Remember your RX400 is a six cylinder and not a four cylinder like the Prius.

It could also be the fuel. In some states they use oxygenated gas which contains Ethanol. This will give you less energy thereby decreasing your gas mileage too.

Took mine in for O/C at 45,000 miles. Dealership while servicing the vehicle, checked the battery, found an issue, and replaced the battery free. Vehicle is almost four years old.

Per my Owners Manual, page 167, states without tow package 2000 lb. (907kg)

with tow package 3500 lb. (1588 kg).

I tow my Bass Tracker Pro 17'7 with no problem at all. My vehicle came equipped with Lexus tow package, receiver, and hitch. B)

I am in the final stages of purchasing a 2010 FWD RX450H. The dealer is installing the hitch and wiring harness, however, I cannot seem to get a solid answer on what I can tow with the vehicle. I was told by the dealer that I could tow up to 1000 lbs, however, my wife's uncle also has an older model Lexus hybrid SUV and he was told he could not tow anything.

I am only looking to tow a waver runner which has a combined weight of PWC and trailer of just over 1000 lbs. Additionally, I would like to add a "trailer hitch basket" to haul fuel cans for my water craft. The tongue weight with fuel cans could reach 300 lbs, however, I can obvioulsy decrease this by carrying fewer fuel cans. The wife won't let me put fuel cans in the back of her new SUV

Can anyone tell me if this is a feasible plan or am I wasting my money putting the hitch on the vehicle.

Thanks

John

I only use premium gas in my Lexus. B)

It reads 30.9 mpg. B)

I just did it with my RX400h last week. Check out my avatar.

I was driving my wife and son back from Winter Park, CO and you can see from my avatar what my mpg was. :D

Sorry not yet. I am only at 39700 on mine. :D

See if this answers your questions.

https___secure.drivers.lexus.com_lexusdrivers_my-lexus_resources_download-owners-manual.do_docURI=http___tis.tmsnet.toyota.com_t3Portal_resources_jsp_siviewer_index.jsp_dir=omms_07LexMS_MS0009&href=xhtml_07LexMS_MS0009f.pdf

See below.

I just spent three days in Santa Fe, NM taking my son skiing at Ski Santa Fe. There was ice and snow on the road at the top of the mountain. I had no issues with my tires which only have 6,000 miles on them. They are Bridgestone Alenzes.

I upgraded my GPS from 7.1 to 9.1. The only change is every time you activate it you no longer must agree.

SOMEONE ELSE'S GOT MY NAME.

From your picture it appears you have either an 04 or 05 Prius. I also have AWD Rx 400h and a 07 Prius.

Page 414 of the 2007 RX 400h Owners Manual states" Premium unleaded gasoline with an octane rating of 91 or higher required for optimum engine performance." It also states"If premium gasoline is not available, you may use unleaded gasoline with an octane rating of 87."

Just remember that the traction battery like in the Prius works best between 70 & 80 degrees. I am currently averaging between 27.8 & 30 mpg here in El Paso, TX. If you just set your a/c to auto, recirculate, and between 74 and 76 degrees you should not see a hit IMHO. B)

2007 owners manual states premium 91 Octane.