paperthin

Exactly what he said. We do get high 20s in winter and low 30s in summer though.

MellonC00

I just hit 61K miles............. for some reason, my last 4 fill ups have gone up in MPG. My usual 25 mpg is now hitting 25.5 mpg. this is with frigid (for CA) winter temps and running heater in the morning and relatively lower tire pressure (35 in front and 32 in the rear).....

Gampa

After 65K my average mileage has dropped below 25,0. It has slowly dropped from an average 27.0, with as much as 30 + on long trips. I have used regular gas all of her life.

I have read on the Toyota Highlander Forum web site that they are required to change spark plugs at 60k. for engines 2GR-FKS.

I recently read a short-cut method, from YouTube, on a way of removing the wiper blade unit and plastic catch basen for access to the 3 rear plugs and coils, seemed like an easier way to remove the rear coils and plugs and he claims it takes about two hours.

I am wondering if changing the spark plugs and coils will increase the mileage back to when I first bought the car. I probably will also change the red antifreeze coolant... and that would complete my 60,000 redue.

The 6 coils I am looking at are from Amazon for about $90, unless someone can convince me otherwise... and the plugs will be Denso Iridium number 3426 from Advanced Auto for 10.50 less 20 %.

What do you Think?

I read people are getting 2-3 more mpg.

gadgetman1

Gampa

riredale

As for plugs and other items, I would follow what it says in the book. And I imagine if a plug is consistently misfiring you will know about it immediately as the computer will throw a code and turn on the Check Engine light.

As for mileage, my impression is that the #1 thing that just kills mileage is engine warmup. If I do nothing but a bunch of short 10-minute trips starting with a cold engine every time, my mileage will be no better than in the teens. Once warmed up, however, mileage in the high-20s.

joeyLexus

Recently purchased a 2012 450h with about 75k miles. Driving in the (northern, cold) city and so far through a quarter of a tank have been averaging just over 20 MPG. This is mostly with Eco Mode engaged. Should I be concerned? This is barely beating our 2011 RX 350.

Thanks!

CNickyD

I have a 2015 RX450h with about 52K mikes on it. When I first got it in 2014, after filling the tank, the “number of miles to go” was 475. Then months later it became 425. Ok, still good. But then that number became 375, and now when I fill up, it’s 325. So that’s all the miles I get out of one tank.

Mentioned it several times to the dealer, but they have no solutions. What’s going on??

MellonC00

for the first time ever, with 3 miles of range remaining, I was able to fill 16.2 gallons at the gas station. this still leaves 3 gallons of "safety" as our capacity is 19.2 gallons. Has anyone ever filled up with more than 17 gallons? Is it even possible?

tus

I would guess 19.2 is the nominal capacity that the marketing guys use, 16.2 is closer to the usable capacity, and the actual capacity is somewhere in between them.

FWIW, I try to always keep at least half a tank under the theory that a fuel pump submerged in gas will benefit from the additional cooling and lubrication that may be provided. I have no actual data that this makes a difference or not, but, I also have never had to replace an electric in tank fuel pump on any vehicle I've own in the last 35 years.

Droid13

19.2G is the RX350 tank capacity. The RX450h specs indicate a tank capacity of 17.1USG / 65L When the warning comes on, I can usually put in about 55 to 57 L.

MellonC00

I was mistaken. Yes. it is 17.2 according to the book. I was actually close to running out, I guess.

salimshah

A big for hybrids.

Salim

TommyTT

try an ISC reset procedure to reset the battery charging logic. 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.

Droid13

The last couple of weeks I've been flirting with a new tank record. Best previous was 7.4L/100km (31.8mpg) around same time last year. I don't know what it is about this time of year, but I find its the best for mpg. This last tank the readout has been meandering between 7.5 and 7.3 (31.4 to 32.2mpg) mostly. About a third of a tank in I was actually at 7.2 (32.7) and was holding at 7.3 by the halfway point. I thought for sure I'd make it. But the last few days turned a bit cooler than optimum, and on the last day the wife decided to use the RX to take a bunch of friends to lunch and brought it back empty at 7.5. Oh well, it was a good run which included passing through 190,000km (118,000mi)