Here's mine from last night. I filled up, drove from the south side of Chattanooga, to the south side of Atlanta metro. This took me through Atlanta, into Peachtree City. My sons called me on my way home and wanted me to pick them up some food from out.

Before I sat in the drive through, and drove around through PTC, it was reading 31.3 mpg. I had you beat ... but after the drive through, it came in just under your mpg. This is a 2010 L model, RWD.

 

Only about 40 miles after refueling and heading downhill on a freeway.

 

Only 51K on the odometer on a 2010? Wow...that's low!

 

Yeah … and I've had to be driving it a lot here lately. My mom passed, and my dad can't seem to get along by himself, but won't move. So I have to go up there frequently over the weekend.

 

I don't have a very good high mark yet. I haven't really taken any road trips. Plus, being winter I assume it's lower than summer.

How much difference do people see from summer to winter? I'm in the Milwaukee Wisconsin area for weather reference.

 

I am in the Twin Cities and see a 3-5 MPG reduction from summer to winter. When we drive to the cabin I get around 28-29 in the summer and around town I am 25-26. In the winter those numbers go to 25-26 and 22-23 in town. All cars waste a little more gas warming up their engines in winter.

 

I believe (but will probably get crushed for this opinion) that the lack of AC use equates to a greater increase in mpg, than the decrease in mpg cause by winter blend fuel. No AC use on my run from above.

(Ducking and covering now...)

 

6.7 l/100km is about 35.1 MPG (US).

Basically I filled up, then drove 3.1 km (1.9 miles) back home with a warm engine and a full hybrid battery. The route isn't exactly downhill, and I had AC and seat & steering wheel heaters on. However, as an experiment I drove in an atypical manner; rather quick accelerations followed by stretches of electrically-sustained cruising/coasting.
Normally, when I drive home from that fuel station, my average consumption on that trip is about 14 l/100km (17 MPG)!

Ordinarily, my average consumption is around 11-12 l/100km (19-21 MPG), in a fairly urban-ish setting.

EDIT: 45mpg on the same route a few days ago:

 

This is the only time have't done a bunch of warm up and small trips right after a refuel. This was probably 120 miles into the tank.


​​​​

 

Wouldn't this be fun.

 

Did you photoshop that picture?

 

What gave it away?

 

A very well maintained and pampered 2007 LS 460, mostly stop and go city driving, (98% of the time), AVG 15 MPG. On rare occasion where I combined a little freeway driving, (about 15-20 miles round trip or so), I've gotten no more then 18.5-19 MPG. On occasion in a cold day in Michigan where I reside, I get as low as 13.5-14 MPG. Car has 82K on it and I had it for over 4 years (bought it used). Never, ever, did I get any numbers higher then that! EVER!!! What gives (yes I always use 93 octane premium Mobil fuel when I fuel it and like I've said before, religiously maintained)? How come everyone else gets such a terrific gas mileage? I don't get what am I doing wrong?!?!?!? Please comment/advise.......

 

You need to take longer trips while the car is already warmed up to get great numbers.

 

Efthy2007 - I'll comment for what it's worth. Are my numbers correct? Yes. Are they realistic? Not so much. I was at my dad's house and it was running on vapor. So within maybe 3 miles after topping off (with really inexpensive gas), I hit the interstate. From there to my exit, I pretty much held it on 72 mph. Why I run 72 mph is a bit of a story. I don't always go that slow. But, to keep the story short, I have a fun little toy called a Honda Rebel 250. It's max speed with my big Shrek body is 72 mph. I've held it WOT on that same interstate run a few times. Other Rebel owner's talk about how dangerous it is to be on the interstate limited to 72 mph. I have not found it to be so. I've never had 1 instance in my whole driving career where gaining speed quickly got me out of a crash or near crash. It has always been use of brakes that has prevented accidents. Anywho, from time to time I like to cruise the interstate and do, "Rebel speed."

At Rebel speed, no A/C, I also try not to let traffic cause me to cancel the cruise, or push the accelerator to make moves. I just plan ahead and make my moves all at my set speed. So between Chattanooga and Atlanta, I can cruise that whole distance and usually cancel the cruise only once or twice. It doesn't get much more efficient than that (unless I just go even slower). At my exit, I hit the backroads down to my town at 60 mph, and managed to eek my mpg up to 31.3 mpg (I think it was), before I went through a drive through, and stop signs, etc.

Now I'm on the same tank of gas just driving around town, and that posted 30.7 mpg above, has now plummeted to mid to lower 20's. In your case, maybe you idle to warm the car up. Maybe you drive in heavy traffic and lots of traffic signals. Consider this: Every single gas powered car in existence will get better mpg at full throttle going down a dragstrip than it will sitting still in traffic. Sitting in traffic, you're achieving 0 mpg. That time sitting at 0 mpg decimates efficiency. My 31.3 mph had almost no time sitting and idling (I went back to my dad's house after topping off, so a couple seconds before and after getting in and out of the car but that's it). It's the conditions your vehicle is exposed to that result in low fuel economy. With the caveat that some poor tuning conditions can waste fuel … but that doesn't sound like your car's issue. FWIW.