R-Spec MPG

[Xtalgic]

Lookin' to buy a 2013 R-spec, went to test drive one and the gauge read 8MPG average! Led me to believe they were abusing that particular R-Spec at that dealer. Curious to know what real world numbers for average MPG people are getting with their R-specs.

 

[dareckibmw]

Who cares! you'll get 429HP so enjoy the bloody beast!

all jokes aside....in mixed driving I get 17-18 mpg, and believe me...my foot is heavy

 

[geops]

To break it down with my numbers:
15-16 MPG in the city with average traffic
14.* MPG in the city - summer with regular use of remote start (it's really hot in Louisiana)
24-25 MPG highway at ~80MPH (~2000RPM)

 

[brfatal]

I typically get 15.x mpg mostly highway, though my gf has a lead foot when she drives it. On a 2,500 mile road trip I averaged 20 mpg @75 mph. The highest tank average I've gotten was 23 mpg on a down hill segment of said road trip.

All of these are real numbers based on gas consumption, not the read out in the car which reads high. All on 93.

 

[427435]

I keep records of every fill and will do an overall average when I've got a little time. However, at 70 mph on the hilly 4-lane highway between Rochester and Minneapolis, I get 24-25 corrected (the readout reads about 9% higher!).

 

[geops]

I never physically measured the consumption - expected the car calculation to be accurate.

 

[Gunkk]

Most folks here see 5-10% higher readout on the car display than actual miles-driven/pump-gallons.

 

[landtuna]

Be aware that immediately after a fill-up the MPG readings will be off as the computer recalculates. It takes about 20 miles of driving for the reading to be anywhere near accurate.

I have a 2012 R-Spec and have averaged just under 20 in town and in the high 20's on the highway. I am a pretty easy driver but have been known to gas it on occasion.

As a comparison, my previous car was a 2011 Santa Fe (V6, no turbo, 6-speed auto) and it got about the same mileage.

 

[427435]

I never physically measured the consumption - expected the car calculation to be accurate.

Mine isn't. I tracked the indicated mpg and the actual mpg over several tanks. The indicated mpg was over 9% high.

 

[Taxman]

When tracked I'm usually around 5-10% high. Average around 20mpg mixed driving w/ auto climate set @ 68 degrees w/ roof open most of the time.

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[wchettel]

Lookin' to buy a 2013 R-spec, went to test drive one and the gauge read 8MPG average! Led me to believe they were abusing that particular R-Spec at that dealer. Curious to know what real world numbers for average MPG people are getting with their R-specs.

Last time I checked, I got about 18 around town and about 25 on the highway (75 mph). I bought the car cause its got a 429hp RWD V8 plus some other bells and whistles, not for the gas mileage.

 

[Mark_888]

I never physically measured the consumption - expected the car calculation to be accurate.

In the 5.5 years I have been on this forum, no one who actually measured their own MPG said the instrument calculation is accurate. Hyundai has a "thing" about that, and even had to rebate millions of dollars to customers because their EPA ratings were not accurate a few years ago.

The number one thing to ensure customer satisfaction in the automotive sales business is to make the a customer "think" they got good deal, rather than whether they actually did get a good deal. Obviously, this has spilled over to the specs of the car and the even the instrument readings in some cases.

 

[landtuna]

IMHO anyone who buys a vehicle with a 429 HP V-8 and worries about MPG didn't think their purchase through very thoroughly.

Yes, I keep track of my MPG but only to determine if I have an engine problem. I didn't buy this car for its mileage and neither should anyone else.

 

[Slowpoke]

Over the last couple of years my '12 R-Spec is averaging around 18 city, 25 highway. I can, and have got better, but I don't try.



As far as the mpg on the R-Spec at the dealer, I wouldn't worry about it. When it is hot outside the Genesis dealers often will crank up the AC and let the car cool off before a customer test drives it, or at least they did for me.

 

[leadfoot rspec13]

Another good question might be to ask about comparative numbers when running 429HP on premium vs. 421HP on regular.

In the 5 months I've owned the car, I haven't tried the lower octane rated fuel. Just wondering who has and if there was an appreciable drop/increase in power and mileage.

Anybody?

 

[carlosinseattle]

I bought my 2014 R-Spec at the end of June. I have only used Regular gas, no premium. I got 17.8mpg on the last tankful. This tank is at 16mpg. Not sure why it is lower except I haven't driven on the highway as much this last week.

My car has averaged in the 17's since I bought it, I'm at 1200 miles now. All these numbers came from the instrument cluster, I'm not calculating independently.

 

[landtuna]

Your numbers sound about right. Highway use, as long as it isn't stop and go commute type, will increase your average MPG greatly.

Starting an engine from cold will decrease your MPG so Seattle weather might be having something to do with it too.

 

[leadfoot rspec13]

It now appears we have baseline figures from both ends of the chart. I would guess that the majority of Rspec owners run premium fuel exclusively. Then there is Carlos who operates his Rspec on regular gas only.

All of us have a pretty good idea of what mileage we are receiving. The optimistic info from the car's display is disheartening. Just when I resigned myself to the realization that I wasn't going to get the same return on my gas dollar as my old 6.0 liter G8 (Re.-AFM), I now learn the numbers provided by the car are optimistically high.

Regardless, it would be interesting to hear from those who have run both grades of gas and can give a seat of the pants report on power drop/mileage increase.

 

[427435]

When I posted earlier on this thread, I forgot to point out that I'm only using regular. I've also noted an increase in my mpg recently------I now have about 13,000 miles on it.

 

[Mark_888]

Lookin' to buy a 2013 R-spec, went to test drive one and the gauge read 8MPG average! Led me to believe they were abusing that particular R-Spec at that dealer. Curious to know what real world numbers for average MPG people are getting with their R-specs.

There is no such thing as average, since some people drive mostly city and some mostly highway. Also, there is a big difference between city driving where you are frequently stalled in traffic, and city mileage where you average 35 MPH.

The best thing to do is look up the EPA city/highway/combined mileage ratings for another car you now own (or have owned) where you now live, and compare that to your actual mileage. Then compare that to the EPA estimates for the 2013 R-Spec.

You can reset the Genesis MPG calculator anytime you want by holding the reset button for a few seconds.