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Chrysler 300/300C: MPG-Real World Numbers



  • vic10vic10 Posts: 188
    The worst I've every gotten was 12 mpg (per the dash computer) during an almost 2 hour housing tour with four people onboard through the chic area of town where I never got above 15 - 20 mph and was stopping every 300 ft. or so. Normal in town only driving gives me 16 mpg to maybe 18, depending on traffic.
  • I have a 2006 300C SRT8 and consistenly get 12-13 mpg in city driving and 18-19 on freeway. Not too bad considering 425hp. I had a 2005 Nissan Xterra with 265hp and was lucky to get 14/16 mpg! Plus the SRT8 is a BLAST to drive!
  • I have a '06 300C. I keep track of all gas purchases. After 21,400 miles the average MPG IS 19.0. We did a trip in August of this year from southern Wisconsin to Colorado Springs and back. The average for that trip (actual fuel used) was 22.6 MPG. The morning we left I reset the on-board calculation and when we arrived home after 2460 miles the on-board calculation said 22.4 MPG. To those 300 owners out there who doubt the on-board computer calculation, I would have to say it is pretty accurate. More than 50% of my miles are city driving, which gives me between 17-18 MPG. The open road travel, like our summer jaunt, with alot of 75-80 MPH cruising gives between 22-23 MPG and the local short trips on state highways (55 MPH limit) will run 25-27 MPG. Of course the MDS (cylinder shutdown) makes a difference, that is why Chrysler is using it. :)
  • vic10vic10 Posts: 188
    Just did a trip from Tulsa to Dallas, 100 miles around Dallas, then the return. Expressway speeds were 70 or 75 (cruise set) primarily with some 45 - 65 areas for construction. A lot of stop and go during rush hour on the Dallas expressways. A/C was on all the time. Average for the whole trip was 25.1 mpg. I'm impressed.....
  • sls002sls002 Posts: 2,788
    The "worldwide Official MPG calcuation" would be liters per 100 kilometers. This is the number of liters of fuel used per 100 kilometers of driving. One hundred kilometers is about 60 miles, so 24 MPG is about 2.5 gallons per 100 kilometers, which is about 9.5 liters per 100 kilometers.
  • sls002sls002 Posts: 2,788
    E-85 is 85% ethanol, 15% gasoline, and is only for engines designed to run on E-85. Most engines are designed to run OK on 10% ethanol, 90% gasoline.
  • ux149ux149 Posts: 18
    I've driven my 300C AWD over 21,000 miles and never gotten above 19 mpg - not on trips, not using various brands and grades of gasoline, not with the AC off, not ever. Mixed driving gives me about 15 mpg. I traded in my Escalade in order to get a more fuel efficient car. Wrong! The Escalade was much better on city and highway results.

    Before you ask why I purchased a Hemi if I wanted better fuel economy... A) I need AWD and of the only two AWD's that came to dealers nearby in the spring of '05 and both were Hemis. B) I somehow believed that my results might be at least somewhere near EPA estimates.
  • donl1donl1 Posts: 112
    :) I've got 18K on my 06' 300C AWD and as a rule anything over 20 is a gift in the winter. With some idling to warm up it's more like 18. It is usually right at 20 in the summer with mixed driving. The best was 23.5 on a long stretch of interstate in Montana driving 75-80. Better than I expected because once in awhile you just have to jump on that Hemi. I've paid more for cars but don't know if I've ever had a better one...never had one that was more fun to drive.
  • I do exactly that type of calculation and have been doing so since I bought the car. I've seen "tank averages" as high as 23MPG and as low as 13.5MPG (trip computer averages up to 25.4MPG). This car is very driver sensitive, but it does have a learning algorithm which will improve economy -if you let it. Consistent (especially after about 50-100 miles of driving) light throttle usage will cause the transmission to downshift less often, shift more smoothly as well as allow the MDS system to stay active under heavier loads. I've gotten very good at feathering the throttle and I can actually hear the car loading up on 4 cylinders while cruising up a hill - but she doesn't kick out of 4cyl until I apply more throttle. Driving hard for 50-100 miles and tranny/MDS will kick out much faster for better performance but lower fuel economy. Also, look into a high-efficiency air filter like a K&N or Trueflo and you might be able to add another MPG on both ends of the range. Good luck!
  • xtecxtec Posts: 354
    I agree with everything you said until you mention to install a K&N filter.I wasted money buying a K&N filter for my '06 Charger SXT.I lost two miles per gallon,plus 5 MPH on speed.After I checked out the stock filter,it says that is a high flow filter.My opinion is to use the stock filter,my results was proof for me.Plus there have been disscussions on forums about K&N,and it a toss up.I think it depends on the stock filter.If you have a thick filter,then i think it may help.The Chrysler filter is thin like the K&N.
  • smithedsmithed Posts: 444
    City: about 15
    Highway: about 24 (a lot of 80 MPH driving) :)
  • My previous post in this portion of the forum was Reply #25 dated December 31, 2005. My 300C just recently turned 40,000 miles. I tallied up actual fuel used and actual miles traveled out of my "little black book" and found that the average MPG for 40,000 miles was 19.1 . I don't think that is all that bad considering the fact I see folks every day driving mini-vans and SUV's that are not getting that kind of MPG. ;)
  • coolrunningcoolrunning Posts: 117
    You are so correct. There are a lot of so-called "econoboxes" made by Japanese manufacturers that get the same mileage. 25 mpg HYW from a Toyota Rav4 is not near as impressive as a 5.7L HEMI doing the same thing! :)
  • coolrunningcoolrunning Posts: 117
    I also installed a K & N air filter on my 5.7 HEMI, and have not noticed any improvement in mileage or performance. If anything, I think the mileage is a bit worse, but I attributed that to the weight of my right foot... I had a discussion recently with someone about the high flow air filters and learned something. These filters really make a difference on carbureted engines where you can get more horses from more air/fuel. On modern engines with computer controlled injection and the combustion air intake controlled with mass airflow sensors and oxygen sensors in the exhaust side, you could take the air cleaner off completely and never change the amount of air allowed into the engine. So, what is the point? If anything, the filters don't clean as well and can allow dirt to flow into the micro-sized orifices that meter air/fuel into the cylinders, etc. I am definitely considering going back to stock filters!
  • shiposhipo Posts: 9,152
    "I am definitely considering going back to stock filters!"

    I'm thinking that that's a good move. :)
  • brit5brit5 Posts: 12
    Fuel injection engines do not work the same way that carbureted engines do.

    With an intelligent fuel injection system, the increased airflow from reduced air filter obstruction results in the metered introduction of additional fuel to compensate for greater air mass-flow. The engine will make more peak power but will burn more fuel doing so.

    Maintenance warnings about dirty air filters negatively affecting performance on EFI engines are quite correct, but the performance parameter that is most affected is power output, not economy. A really dirty airfilter not only significantly reduces power, it can also result in air bypassing the filter altogether, carrying grit into the engine with obvious implications for engine life.
  • You are absolutely correct. If I owned a 1960's muscle car, I wouldn't hesitate to use a K & N air filter. They are a well designed and constructed product. They are such a risk to modern engines, they are even banned from use by Dodge on any DIESEL engines according to the dealerships. They claim the stock OEM filters do a better job of keeping the dirt out of critical areas. Since I can see daylight when I hold my K & N filter up to the sun, I am inclined to agree. Besides, the whole point was to improve my fuel economy which it did not. :confuse:
  • The only way that K&N air filter would make you loose MPG is if you OVER oiled it or didnt oil it enough. and its IMPOSSIBLE for the filter to make you loose 5mph
  • Just bought a 2011 300 limited with the V-6. I got 28 mpg on the 300 mile trip home. by the time the tank was empty the average was 24 mpg on the trip computer, and 23.8 by hand calculation. I love the quiet and smooth.
  • finfin atlantaPosts: 591
    What kind of mixed, all purpose, reasonable driving gas mileage do you expect from this big V8? How about pure highway mileage on a long interstate run? Thanks......
  • finfin atlantaPosts: 591
    edited August 2013
    After 2 weeks of driving a 300c v6 and then a month of driving the v8 here is an impartial summary:

    Size: It's a BIG car.... some parking spaces are hard to use or impossible. Outward visibility is somewhat less than hoped for. Nice backup camera helps. Huge trunk, generous interior w/storage ok but not great.

    On the road: A driver's dream....18" tires are a very smooth ride, excellent Garmin Nav with the SiriusXM.

    Power: The v6 is more than enough and mileage is good as the window sticker shows. The v8 is a gas hog in town, maybe 17 at best, can get 24 on the highway, maybe more. But the v8 power is awesome, a throwback to the 60's, significantly better than the v6.

    Finish: Quality is everywhere.

    Electronics: Equaled only by a small plane, the car shows almost all conceivable temps and conditions. Very impressive. Radio sound good, better are available.

    Headlights: Good by most standards, especially high beams.

    Summary: We bought the 300C for the upgrades, with a v8. Yes, gas and insurance are higher but we will probably keep the car 2 years at most and do not drive much, seldom in city traffic. First American nameplate we have owned in almost 20 years and the long term quality will be interesting to see. Any significant events will appear here on

    Hope this helps if you are in the market for this type car.....
  • finfin atlantaPosts: 591

    Back again after 10 months and 17k more miles.... the 300C is great car so far. Power to spare from the big v8, comfort on the interstate is first class. Garmin navigation and traffic is the best I have ever used in a car, XM radio is very nice. Interstate gas mileage is 26 mpg or more at 70 mph. But: the v8 is a gas hog in town, 17.3 is good and we never drive in real traffic so be prepared if you go with the extra power. The v6 should be fine for most people. The big car is also hard to fit in some tight parking spaces and routine maint on the v8 is expensive, such as spark plugs and only 5k miles between oil changes.

    Would we do it again? Yes. The car has all we need to travel the GA/FL/TN interstates in style and comfort with safety. First America nameplate we have owned in decades except for a T-Bird years ago. The 300C is a winner....

  • finfin atlantaPosts: 591
    At the 40k mile mark the big 300C V8 still gets 26 mpg on the road and the comfort is still there in every mile. No problems. Original Firestone tires went 37k and had some left but we are conservative. Only thing we have noticed is that the front "leather" seats are starting to show wear on the surfaces. We had Toyotas for twice this long, same usage, no signs of wear on the seat edge area. This car needs a better grade of interior material on the seat bottoms, the backs are fine as is the rear seat. Still, a great car for the money, Garmin Nav/Sirius is wonderful.
  • finfin atlantaPosts: 591
    2013 300C...... Just a follow-up at 50k miles..... still a great ride, no problems in last 2 years. Highway gas mileage still 26 or more if you stay under 75 mph, it drops rapidly after that to about 23 or less as you pass 80. Suburban driving, no stop and go, is always 17.5 plus or minus a little... fantastic interstate ride, large inside and a nice trunk. Garmin Nav live traffic and XM/Sirius are still the best available, my opinion. Big V8 uses a little oil between changes at 7500 miles, perhaps 1/4th of a quart, always serviced by a Chrysler dealer. Same consumption as new. The front seats are showing a little more wear as mentioned above, hope the newer ones have better quality on the edges, the centers are ok. If you want comfort and not curvy road handling performance this is the car.....
  • finfin atlantaPosts: 591
    Well.. August 2016... 300C at almost 70k miles the big v8 still produces 26+ mpg on the road and more is possible if you stay under 70 mph. Ride is great as always. Brakes will need to replaced soon. The heater control needed a plastic valve replaced at $160., common problem on this car it appears and the backup camera works about half the time. Oil consumption is still the same, modest, with synthetic. Leather wear has not gotten worse and the second set of tires lasted 30k miles but they were not premium tires, so, you get what you pay for. Nothing else to note, still a good car and the Sirius/Garmin combo is a joy.
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