I have a 2007 DS MCS and I'm getting 36.1 mpg.
Jorge

 

You guys are starting to make me think there is something wrong with our S to only get low 20s in town. Maybe because it's an auto.

 

My auto gets better in town mileage in Sport mode and manually upshifting at about 2200 rpm rather than letting it shift itself in "D" at 2500rpm and above.

 

20-24 mpg mostly around town,
used to get 19mpg but getting older and I guess i'm slowing down...

my girlfriend gets 27mpg around town,
driving conservatively by my standards!

 

Lots and lots of us get low-20's in town. Keep in mind that some people's definition of "in town" is fairly wide-open suburban driving over mostly flat surfaces which can result in 5-8 mpg more than true dense/urban driving conditions in hilly terrain. As they say, YMMV.

- Mark

 

I'm getting a solid 29mpg right now. Went up half an mpg during a recent drive from LA to Phoenix though.

 

I have an 06 MCS with 60k. I consistently get 25 mixed (more city) and break 30 on the highway if I set the cruise control at 70. I turn off the AC when the environmental control is set on the Auto. I did not get the car for MPG tho.

It has been difficult to get much better numbers but it is quite easy to get worse.

Motor On!
Chris

 

I have an '03 S with all three pedals, and get about 30-32 in town depending on how well I behave since I got the new exhaust system. Before that it was 28-30 in town, though if I *really* misbehave a lot, I've seen it get as low as 24.

Of course, in the summer, A/C usage chops a few MPG off those figures....

On the highway, it depends a lot on whether I take the Interstate or back roads. I've seen as high as 34 on the highway, though 32 is more common, and if I'm on a club run and misbehaving enough to not get left behind by the other folks, 30 is about it....

C ya,
Dutch

 

05 MCS 65K running 3K RPM=70MPH and about 29MPG. Just seems like the sweet spot for my car. Town driving not nearly at that, but it is a fun car to drive. I'm glad I got one.

 

2003 MCS, 113,5xxK, Last night running @2,950K, posted 41.2 MPG

 

Averaging 19.6 according to the computer for my 3.5 mile comute.

 

Ahh the wisedom of the dearly departed Mr. Carlin who gave us the 7 words you can't say per the FCC, ultimate oxymorons and Al Sleet, the hippy dippy weatherman.

 

Howdy from Houston ... mine's a 2005 S, auto with c 38K miles and my heavy foot on the right hand pedal. Driving is 95% urban and doing the math myself yields right at 25 MPG.

Like someone else opined ... I didn't buy this for its gas mileage numbers

 

6 yr old R53 with 32.5K miles. automatic trans ..gets about 22 mpg (mostly city driving) and about 28 mpg on the highway (usually 70+ mph). When I really floor it, I get about 19 mpg.

 

Picture speaks for itself. This is on a flat open road in Kansas with cruise control set to 70mph. Yes, this is in my JCW!

 

I drove a conservative 55 on a 290 mile journey and by my math got 36.2 in my MCS... If I drive 65-70 I get 28 and 75+ 26ish. I had a journey at 90+ most of the way and managed 21mpg.. woops!

 

Nice. Since I moved to Hell's Forge, I can never seem to find a way to go 55 when I head down to the Old Pueblo, since it's a 75 MPH freeway run. Before I moved from Mesa, I used to go on the Old Spanish Trail through Coolidge and Oracle Junction, where the limit's only 65, so I didn't feel bad doing 60, and I got much better mileage.

However, around town, right after I fill up, if I don't hit any red lights, I get *fantastic* mileage at 40-45 MPH, especially since I got the exhaust system replaced with an aftermarket unit. Just so you know, it's a more or less level trip until I turn off Baseline and head up the hill into the SoPho Piedmont.

Check *this* out, on the way home tonight, just before going up the hill:


Yowza!

I fully expect this to drop off a *lot*, but *WOW*....

C ya,
Dutch

 

My first road trip, I traveled 350 miles and put in 10.5 gal of gas, which works out to 33.3 mpg. the TC said 37.2, so there is some error somewhere. Either way, its pretty decent mileage

 

With my current tune and all my mods I'm getting this:
60mph - 34.5mpg
65mph - 31.3mpg
70mph - 30.9mpg
75mph - 27.4mpg
80mph - 27.0mpg
Back & forth to work 28.0

All of this with 170,000+ miles and still pulling 235whp.

 

IMO the "constant" mpg readings are meaningless in this thread. It's quite easy to get it to read whatever you want.

OP was looking for average mpg, not instant mpg's.

05 MCS, 15%, manual trans, 25mpg, 70% very short commute through town, 30% highway.

This is calculated doing the miles / gallons on a fillup.

I just question the accuracy of the odometer.

 

Yup. The pic I posted a couple posts up is proof of that....

My calculated results run from 30-32 MPG around town if I behave and don't use the A/C. The new exhaust added an MPG or two. The A/C will take it away soon, though. A/C is pretty much mandatory from mid-May until about mid-October around here....

I don't. I *know* mine's about 5% off--thankfully in the direction that helps keep you out of trouble with Johnny Law and his radar gun....

C ya,
Dutch

 

I agree. I use an app to keep a record of MPG. miles and cost per gallon. Highest; 30.7, all freeway. Lowest: my last fill, 22.3, almost all city.

Cheers!
Chris

 

Miles traveled divided by gallons filled. I think the most accurate way of calculating mpg is when filling up.

 

Memorial weekend saw 36-40mpg highway... 70mph bout 3k rpm.. Im on 15inchers id think my mpg would be less..

 

I had a record breaking tank going, but had to race before I got to the bottom of it. (One races on 1/4 tank, so I could not fill it!)

The top quarter is normally 150-160 -- this one returned 195
The top half is normally 220-240 -- this one was 295
The top three quarters will usually go 290-310 -- this one went 360

I was on track for about 430, a new record for this car...

Oh well - the racing was worth it! But watching the mileage certainly helps me drive gently, and that also helps me stay ticket free (knock wood).

Cheers,

Charlie