schen72

Keep in mind that many older people don't surf websites. There are plenty of older people who buy Acura. And most of them are probably not interested in modding.

malnik

You guys have sucky-@$$ gas mileage. It must cost you a fortune running this thing. That's why i love my TSX

vrflyer

I could care less about how much I spend on gas, that's why you have a nice job to support your vices in life... [/insert super evil smiley here]

edadams3

Yesterday I was averaging 22-23 mpg on the highway @ 65-70 mph. The vehicle only has 1400 miles. I do hope this improves, my 06 Infiniti M35 gets 25 on the highway @ the same speeds.

Animagix

you bought an suv with a turbo in it. considering it's an suv your highway mileage is pretty good and considered one of the best in its' class.

Local city driving is what worries me. I get as low as 14mpg without boost. NYC local traffic is completely nuts since every block or so is either a stop sign or a red light. I'm talking about small street blocks not avenue blocks (new yorkers will know what i'm talking about)

HenryFL

The M35 is a CAR- so a SUV thats 4000lbs with turbo should avg 20-24 hwy.

And if I lived in NY( I used to) I would be driving a hybrid-Prius or and suv hybrid if MPG was a concern for me.

cFoo

It's not just the engine. With colder temperature your tires pressure are also lower. More friction on the surface. It's amazing how 1-2psi can have a huge impact on your mpg. I've noticed I loose about 25-30% in the winter with snow tires and hardtop on my S2000. Even without snow tires as soon as the temperature drops below 10C/50F I'll start to notice having to stop for gas more often.

FitnessCC

I seem to average 21-22 mpg, driving about 75% highway. It's about 18 city/24 hwy on average...isn't that just about the advertised mpg? While it's not the 24-26 I averaged in my TSX, I LOOOVVVVVEE my RDX and consider the mileage adequate (if not great) for an SUV.

Animagix

I'll likely get a cheap city beater.

Radec

I consistently average just over 20 MPG with 50/50 city/highway driving (and a lot of that highway is stop and go traffic ) Every time I fill up it is always between 20.3-20.6.

lilfeat

Maybe you should get a Nissan Versa. It gets much better milage than the TSX.

MMike1981

lol im not sure if i can think of a reply to this. you want IMPROVEMENT?

reed7970

My RDX is fully broken in, 11,000 miles on it now. I'm getting about 20.1 city. For about the first 6,000 miles I was getting 17.5 and it went up slowly from there. During the week driving to work I drive like a grandma.

Highway I'm getting around 28mpg now.

JMJ3rd

Update. Turned 10k (back to zero) on the "B" trip meter with an avg. of 19.7. I didn't reset. I have a total of 17k.

wwest

Improving FE...??!!


https://acurazine.com/forums/showthread.php?t=2264

Cocoa

iTrader: (2)

I get 30mpg in my 1st gen CL on the freeway. It's completely stripped, and threw in a 6 speed tranny. So those are you two major factors as to why I get that gas mielage. So I hit 400 miles before filling up.

The way I test my mpg, is total miles driven divided by amount of gallons it took to fill up. I get 29-30 mpg everytime.

Did I forget to mention this is on a blown motor? (blown head gaskets)

I honestly thought you guys would be around 25+. The RDX is a 4 cylinder turbo right?

VeNeNo

iTrader: (1)

I'm averaging 14-15 mpg at best... damn you SH-AWD, why do you have to be so dynamic...

cyrusthegreat

how many miles do you have on your car? I'm getting the same mileage as well, I have 750 miles on mine, i'm hoping that it gets better as the mileage gets higher.

wwest

Don't blame it on the SH-AWD system..!!

The problem is an 8.5:1 compression ratio in order to "accomodate" the turbo boost once the turboes actually spool up. The problem is that until those turboes spool up you are running, accelerating, with an EXTREMELY inefficient ,low (poor) compression I4 engine.

The RDX needs a form of VVT-i, Variable Valve Timing w/intelligence on the intake cam side. Modify the intake cam timing on the fly, dynamically, so it moves in and out of Atkinson cycle mode under control of actual boost pressure. Only move, gradually, into Atkinson cycle mode as the boost level rises higher and higher.

Atkinson cycle would allow a portion of the A/F mixture in the cylinder to be forced back out into the intake manifold thereby resulting in lowering the "effective" compression ratio as boost level increases.

See:

https://acurazine.com/forums/showthread.php?t=2264

VeNeNo

iTrader: (1)

I have just passed the 14 K mile mark, but I have a heavy foot though. I could get 17 mpg average or so if drove a little lighter... but then that would take all the fun out of driving

karrock

Not sure what you mean, because the RDX has i-VTEC... VVT-i is Toyota's branding of the process you describe:

wwest

Yes, but it does not yet have enough intelligence to change the engine into the Atkinson cycle mode as the turboes spool up and boost rises.

That would probably result in improving FE and performance, by flattening the engine's torque curve.

gauch0

r u from cebu?

Claire

My car has about 4300 miles on it and I got it last April so I do not drive much, mostly short trips to and from the train station. I am averaging 17.5 mpg so far and will be taking it in for its first oil change next month ;-)

ckiggins

I've been filling up at QuikTrip (a midwest chain) with 91 and my mileage has been averaging 18. When I used gas from Costco (93), the economy was up to about 22.

Can an increase in octane make such a difference in fuel economy?

HenryFL

Read thishttp://wiki.answers.com/Q/Will_using_a_higher_octane_fuel_increase_the_car's _miles-per-gallon_rate

HenryFL

Read this:


http://wiki.answers.com/Q/Will_using_a_higher_octane_fuel_increase_the_car's _miles-per-gallon_rate

Patronus

What it needs more than this is an increase in compression ratio, enabled by direct injection (being able to time the fuel injection independent of valve positions, etc.). VW/Audi has done this on their 2.0T with absolute amazing results wrt performance and efficiency.

karrock

I've gotten as high as 26.5MPG on Trip A before a bout of really cold weather struck and walloped it down to 22 and change. Not quite hyper-miling, but that was a tank of light-footed driving: taking off semi-slow-and-easy and keeping to the speed limit. Taking it softer with your driving habits really does have its benefits. Figure I'll experiment with 10 over highway with the next tank.

Trip B is averaging a much less miserly 19.4, which hasn't been reset once since I bought at the end of Sept. Granted, I try not to lead-foot from a complete stop, but I do enjoy spirited driving, since the RDX is well capable and plenty of power is available under the hood. I have tended to go a fair amount above the speed limit on the highway (*cough*20*cough*), so that's a knock towards lowering fuel economy, but I'm trying to be better about that.

Joshsimon19

I have been getting about 14 mpg with almost completely city driving. I have 2000 miles on the car and haven't taken it on any extremely long drives yet. I do not know how people are getting over 20 mpg on here. I hope it improves like some people seem to have experienced.

vrflyer

And hence why their engines are not up to par for longevity, and transmissions...

VW/Audi engineering =

heffergm

They're getting over 20mpg by not driving in the city. Accelerating a 4000lb object from a stop over and over again takes energy.

If that same 4000lb object is rolling along at a constant 65mph, it takes comparatively little energy.

Just move to the country and all your problems will be solved.

MMike1981

yep, got 109 miles out of a 1/2 tank this week...90% city. but it was a gear ripping 109 miles, lol.

note to city screamers..if u havent already done so, turning off the VSA unleashes a bigger beast.

karrock

Sorry, but I don't live in "the country". I drive in the Washington DC and Baltimore metro areas on a daily basis. DC is number three with a bullet for worst driving congestion, behind only the reigning west coast pair Los Angeles and San Francisco. Sometimes it's even referenced as number two.

I make a sub-9 mile commute every weekday and it can be anywhere from 10 minutes without traffic to a half hour on a not-as-good-day to hours on the worst. On a particularly slow day, it took me an hour to drive about a mile. No accidents, no disasters, no bad weather, just awful congestion and a healthy dose of gridlock. After I made it across town to the highway on-ramp, I reached home in 15 minutes.

Yes, the RDX is heavy. Two tons heavy. Yes, it's a 4-cylinder. Yes, it's got a turbo. Yes, it's all-wheel drive. Yes, it's tuned more for performance than efficiency. Yes, the accelerator pedal is quick to spool up the boost. All of this contributes to somewhat unspectacular gas mileage -- for the record, the CX-7 is even or worse, even with FWD underpinnings. But I still love it!! You can't have your cake and eat it too. It's the price you pay for a luxury, performance-oriented sport utility.

LuvMyRDX

Only about 1300mi on it at this point and we're averaging about 23mpg. More spirited driving since the 1000mi mark and still the 23mpg mark has been unscathed. It's been a steady climb up from our first tank of 19. No true hwy trips to speak of yet, but I'll take 23 anytime with power like this.

onelatte

just turned 10K on the odometer and have had the "b" trip meter tracking mpg since about 4,000 miles. In the last 6,000 I've averaged almost 23 MPG. That is mostly highway (I have a 500 mile per week commute to work) but it's at 75 MPH as well. Weekends are the typical mix of around town driving.

You really can get 20 MPG or higher on an RDX you just need to lay off the turbo. Think of the turbo meter moving in inverse to the gas gauge...the more you goose it the more it's going to cost.

R*D*X*

You are wrong, AWD always less 1 MPG compare to 2WD..If RDX will have 2WD that will be better gas mileage compare to 4WD

sgeorge

11.8 MPG

--------------------------------------------------------------------------------

Getting Actually 11.8 mpg and in the trip odometer 12.8 mpg and my current reading 1850. Mostly stop and go driving - to and from work. Tried Mobil - 93 octane

Patronus

I came from a 2WD Audi w/ a 2.0T. It would get 24 mpg in my mixed driving. As I anticipated the drop in economy I estimated a 1 mpg drop for each of the following:

- AWD
- Automatic
- 700 lb heavier
- 0.3 liter bigger motor

As I now get 20 mpg in identical driving, I think my estimate was accurate.

mav238

Exactly, just stay off the lead footed action, and you will see better fuel economy...

I get about 20 mpg for mostly congested city driving.

Yes, the gas prices are going up, but we bought the RDX for our own particular reasons, and fuel economy is not one of them.

You know, the folks in asia, like Singapore, are paying up to $2 a litre, which is roughly $7.60 a gallon, or approximately USD6 a gallon. In europe, it is just as bad or even worse.

Just drive more sensibly, take the lead foot off unless absolutely required (like passing another vehicle), plan your trips, maintain your vehicle regularly... and enjoy the RDX.