MI-RDX

Nope, the EPA mileage testing is quite involved.

Here's an overview of the process: https://www.fueleconomy.gov/feg/how_tested.shtml

...and here's the specific protocol: https://www.fueleconomy.gov/feg/fe_test_schedules.shtml

On that 2nd link go the the last tab for a summary overview.

TLMDXRDX

So maybe if I move to sport mode I will get better MPG? I have the same city/hwy ratio you had and used premium fuel and got 4.3 MPG less which seems odd. Are you going above 2000 RPMs often in getting to your desired speed?

cengel

22mpg average for us after 1000 miles and 93 octane. about 50:50 city/Houston area interstates. Advance with SH-AWD. 80% in sport, the other 20% in comfort and +. I did get 27 driving about 40 miles in I-45 at an "easy" 65mph. I feel the mpg numbers are a bit stretched. For contrast, we purchased a 2018 Honda Accord Touring at the same time with essentially the same engine. Using regular gas in that one and driving it more aggressively. It seems to average 25 city and 35+ easily on the highway.

mcrompton

I got 22.75 MPG (hand calculated) on probably 60/40 highway to in town driving but engine is still under 1000 miles and not broken in.

jbinnyc

oblio98

After 4500 miles I'm averaging 21.4 miles, hand calculated, I've been using mid-grade unless premium is cheap (like at Sams or Costco). I drive highway and back streets, not too much city. I also tend to be a bit at the top of the speed limit chain.

On a side note, I actually got to the '0' miles left, and the gas gauge going completely out today (not intentionally)!! The car took 15.8 Gallons before auto-shut off when I filled it up. Just FYI in case you find yourself in a similar situation.

gtssenior

1500 mile trip with trip computer reset at the begining - 75% interstate, average speed 73 mph, Comfort mode, SH-AWD/Advance, level terrain, used ACC, the remainder stop and go in Sport Mode, 93 octane fuel mostly with one fill up using 89 octane - MPG calculator showed 28.4 at end of trip

robuckj

Madd Dog

mcrompton

On my second tank, which half of which was a drive from Cary to Asheville and back, I got a little over 25 mpg total.

CGO

About 1400 miles on a Canadian Platinum Elite SH-AWD.

About 50/50 City/Highway. City being 30-45mph, Highway being 70-75mph.

100% 91 Octane. 100% Sport Mode.

Mileage: 25mpg (Imperial gallon), 21 mpg (US gallon). Not according to the trip meter but calculated.

My lifetime average on my 2012 TL SH-AWD was 26 and 22 ...

billyt1963

OK, so I have filled up the tank for the 4th time. Driving has been about 80% in town, probably 50% Comfort, 35% Sport, 15% Sport +.

Calculated averages 20.4, 23.9 (mostly highway), 21 and 20.8. Car estimates 20.9, 22.6, 20.8 and 20.9.

The averages for the RDX are not much different from my 2012 TL, SH AWD at the end when the driving was pretty similar.

Billy

_korangar

I've only filled up once (I have about 450 miles on my RDX) but when I got out the car this morning, my average is at 25.3 combined. That's a bit higher than what I've been getting. Usually I'm around 24 MPG. This is with 25% city 75% highway but I'm stuck in traffic quite a bit in SoCal.

yargk

That's cool that so many of you are reporting hand calculated numbers.

Gadget Freak

The "AverageMPG" on the gauge panel is configurable in the Settings. The dealership showed me you have several options that change the way it's calculated. the option that makes the most sense (which is not the default) IMO is to have the car reset the Average every time you fill up. [You'll notice it decline if you just idle after filling up; and change less and less as you use more of the tank] The sales guy said it's fairly accurate.... of course the true MPG is the old fashioned way by logging your tripmeter mileage divided by your gallons every time you fill up.

yargk

On my VW (jokes aside), it's horribly inaccurate (31 mpg indicated, 26.3 actual). I'd only trust the average the car calculates for my own purposes, not to share with other owners just because it's only really useful to share verified data.

Madd Dog

billyt1963

Hey all, just wanted to give an update from a drive I took today.

I got to drive to Chattanooga, TN to Tracy City, TN, 48 miles (+ or -) one-way, almost 1200 feet of elevation gain. 2/3 freeway driving, 90% comfort, stayed close to the speed limit. Going up the back road to Tracy City is a *fantastic* drive in a sports car (or a SH AWD vehicle), so I did have some fun.

Billy

_korangar

Filled up for the second time on Friday. Trip computer stated 25.7 MPG and I got 24.7 hand calculated, so a mile off. I got 350 miles before I decided to stop and get gas. I'm not sure how far I'm willing to go down before a fill up. Has anyone tested this yet?

107main

First, I do NOT have a 2019 RDX yet, but I took one for a 120 mile trip doing a dealer transfer. It had 800 miles on it when I moved it, daytime about 85 degrees. In my case, I reset the MPG readout, and drove the 120 miles with all but several blocks on the interstate. For the first 100 miles, it was in the SPORT mode and the MPG indicator was at 27.8-28.0 mpg, I then figured out how to get it into COMFORT mode, and for the last 20 miles, it was reading around 31 MPG. I drove in the 70-75 mph range. I was impressed and am even thinking of getting one. But, I have looked on here and am really disappointed to see the poor mileage reported and I will have to drive more of them before I make a further decision. Could it be, too many of you are getting lead feet on your vehicle, I do not drive like that, I go for mileage on all my vehicles, thus, I tell people, I drive like I have a egg between my foot and gas pedal, trying not to break it. Yes, I know that one likes to hit the gas, and I do at times of need and no need just to have fun. I hope I see better mileages posted here. I do not have a chance to test the new cars on local driving, so cannot report on that. Normally, I drive for Honda and there is a quirk I find in most all Honda's when they are new: For some reason, I dont know why, but when i leave a dealer to move a car, I reset the mpg A and B, and many of them show very low mileage on both A and B. After 5-10 miles, I usually reset the B mpg readout and then I usually get a much higher readout. If I leave the A readout and go all the way , a 100 miles or so, the B readout is always the highest, but the A will come up, but not to the B readout. In other words, I am saying that there has to be a quirk in the mpg readouts on a new vehicle. Now, since I have only driven one 19 RDX, I cannot confirm this happens in them, but since both probably have the same parts, it will probably happen on them too. Perhaps some of you can try a reset and see if it gets better MPG. I have driven Hondas for years and 100's of them I can say I have definitely observed this happening. One of my things is MPG and I check it on every car I drive do these transfers. Thanks for reading
Rob

107main

I have driven the new Accord 2.0 10 speed auto and achieved around 36 mpg from meter. I moved cars, so I dont get to fill them up to be able to do that, just put enough gas in them to get them to another dealer. How far off the meters are, I dont know, but generally they are like 1-2 mpg lower than the in car readout.

mgrody

It seems that the Gen 3 I-4 turbo gets pretty much the same mpg as the Gen 2 V-6.

Twaeball

This car is fun to drive. Hard not to have a lead foot when I have a new vehicle.

107main

I understand, over my years doing dealer transfers, I have driven all kinds of cars from used junk to around $150k vehicles. I remember going to Chevy dealer to do a dealer trade, and went into the office to get ready to go and heard this rumbling out side the back of shop, it was my ride to the other dealer...a brand new Corvette Z06. I drove it like a baby, but did get on it a few times. Funny thing, I saw more Highway Patrolmen on that trip than normal. The new Accord 2.0 ten speed auto is a rocket and fun to hit it now and then.

Gadget Freak

How did you get 29.8? Wow.

So I see other folks are getting rated mileage. I'm wondering if I have a lemon or just need to drive like and a granny and never pass anybody (kinda defeats the purpose of driving an RDX) I have 1800 miles on my RDX SH-AWD (Comfort mode) and I've had several 250 mile trips. So far, my MPGs are 18.25, 20.5, 19.48, and 20.93.... not one tank better than rated City 21 MPG, yet alone the 27 rated highway. I've been using 93 octane premium. What am I missing and do I have a lemon? What's your secret? Driving 55? ....I'd get killed driving that speed in Texas.


I like everything else about the car except for the as-yet empty promises on getting Android Auto....

MI-RDX

Since getting mine over 1300 miles ago my mileage is sitting at 23.8. About 65/35% city/highway (highway is 70+MPH). I've only put in Shell or BP 87 octane, don't know what the dealer had in for the first tank.

billyt1963

107main

Dang, i got a Tacoma v-6 truck that gets 18-21! Of course, I dont lead foot in it.

fodder

Something seems wrong with the 16.5 mpg calculation by Dizzy's RDX. Dizzy states that there were 300 miles on the odometer and the RDX was on the first tank. The tank only holds 17.1 gallons. If the tank was empty at that moment, the mpg would have been 17.54 mpg (300/17.1). Assuming the tank shows "empty around 15.5 gallons, the mileage would work out to 19.35 mpg (300/15.5).

107main

If I owned a new RDX and got that terrible kind of mileage, AND I was not a real leadfoot, I would be camped out at the dealer demanding they fix what was wrong with the vehicle! I guess it is possible to leadfoot one to get this mileage, but since he is concerned about mileage, I think he must be trying to drive it sensibly. Also, remember, "comfort mode" will get you better mileage. Comfort mode got 3 mpg more for me vs sport, on a recent trip in one on interstate, up from 28 mpg to right at 31 mpg according to the mpg gauge on the car,which may or may not be entirely correct. These poor mpg's being posted on here plus other problems with the vehicle, have changed my mind and I will think a long time before getting one, giving time to learn more and for Acura dealers to get the bugs out and MSRP prices out of their heads.

Stew4HD

3300 miles, in sport and comfort modes: 24.5 with roughly 90% highway miles

TLMDXRDX

So I reset my trip meter after 1000 miles to see what my MPGs would be from 1000-2000 miles and can now report out. The ratio of city to highway driving was about the same (perhaps 70% city instead of 75% city this time), and I did change two things. First, as someone suggested, I put the car in Sport mode the entire time since I drive more in the city and am probably a more aggressive driver than most. Second, I figured out how to get the auto idle engine to kick in every time I was stopped. Between those two things and the car being more broken in, my MPGs went from 19.7 for the first 1000 miles to 20.6 for the second 1000 miles. We'll see how 2000 to 3000 miles goes, but I just wanted to report out.

billyt1963

TLMDXRDX

I actually created a thread on this topic a month or so ago as I was not able to get the auto idle stop to work very often. I ensured that "Auto" was always on and since then it has worked for me. Someone else said as long as the AC was not cranked up it would work for them. Now it kicks in over 95% of the time for me when I come to a stoplight.

https://acurazine.com/forums/third-g...e-stop-972485/

billyt1963

TLMDXRDX

There are a couple of buttons that say Auto on it I believe (not in my car now but I remember thinking that when I searched for the right Auto button). If you have the right one selected, and have the Auto-Idle button turned on, it should be working. If its still not you might want to call the dealer and ask about it.

billyt1963

Master47

billyt1963

Jeff Thoms