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Cadillac ATS General Discussion Forum Discussion, ATS and MPG - What are you getting? in Cadillac ATS Discussion Forums; I took my 2.5L automatic on its first extended highway drive with a run up to Mt Rainier (Washington) reaching ...
  1. #121
    Vernon Cooke is offline Cadillac Owners Member
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    I took my 2.5L automatic on its first extended highway drive with a run up to Mt Rainier (Washington) reaching about 5,500'. Average for the 380 mile trip was 32.3 mpg. Could have been slightly better without headwinds along the way. City mpg is usually about 22. This matches the stated mpg claims almost exactly.

  2. #122
    rage2021 is offline Cadillac Owners Fanatic
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    Re: ATS and MPG - What are you getting?

    Does anyone know approx. how much more you can drive when fuel indicator says LOW? Is it ~50km or so?

  3. #123
    marktanner is offline Cadillac Owners Enthusiast
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    Re: ATS and MPG - What are you getting?

    Each car will vary some. If one fills up as soon as the light comes on, then you can calculate the amount remaining in the tank. Simply multiply that volume by the average MPG that is being achieved at that time and you will have the remaining range. This will vary depending on your current mileage, city vs highway.

  4. #124
    CZ4
    CZ4 is offline Cadillac Owners Member
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    Re: ATS and MPG - What are you getting?

    Quote Originally Posted by rage2021 View Post
    Does anyone know approx. how much more you can drive when fuel indicator says LOW? Is it ~50km or so?
    You can get a somewhat accurate reading using the OnStar Smartphone app. I think it was 5-7L left in the tank when I checked.

    After 2700kms, I'm getting roughly 19-20MPG with my 2.0T RWD Auto. 80% city driving

  5. #125
    M5eater's Avatar
    M5eater is offline Cadillac Owners Connoisseur
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    Re: ATS and MPG - What are you getting?

    after 1700 miles or so, seems my driving limits me to between 23-24 mpg during the week going to/from work in 50/50 driving and a partially lead foot. 26-27 on mostly highway when I popped over to northern VA 2 weekends ago.

    right on the EPA ratings pretty much, I'm a bit dissapointed in highway, but that may have been a fact of my 65-75 mph average traveling speed.

    I honestly believe that resetting every fill up is too often. Also, if one is calculating mileage manually based on miles driven versus gallons boarded, one is probably not considering that very innocuous note that appears on every gas pump stating that "volumes are corrected to 15 degrees Celsius (59 degrees Fahrenheit), which can certainly effect the calculations in extreme temperature conditions... All of which brings me back to the idea that resetting the "average mileage counter" at every fill up is a bit too often.
    You're analyzing this way too much. Thermal coefficient of petroleum products is about 0.000950 / (C or K)

    ie, for every 50 degrees in temperature drop, you net 0.01425 gallons. Calculate that the fact that storage tanks are underground, and even when outside ambient is triple digits, you might be 20-40 degrees cooler down there and it all really makes no difference at all. *maybe* a few hundredths in your calculations.

    You're also not considering that the pump's measuring devices undergo thermal expansion as well, and it doesn't necessarily deliver the exact amount displayed. It will deliver what it believes is the volume of 1 gallon of gas.

    if there were tangible variations in how much product you're receiving for your $3.5-$4, I can assure you, there would be huge uproar.

  6. #126
    Hoosier Daddy's Avatar
    Hoosier Daddy is offline Super Moderator
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    Re: ATS and MPG - What are you getting?

    Quote Originally Posted by M5eater View Post
    after 1700 miles or so, seems my driving limits me to between 23-24 mpg during the week going to/from work in 50/50 driving and a partially lead foot. 26-27 on mostly highway
    That's just what we are getting in both situations.

    ----------

    Quote Originally Posted by M5eater View Post
    You're also not considering that the pump's measuring devices undergo thermal expansion as well, and it doesn't necessarily deliver the exact amount displayed. It will deliver what it believes is the volume of 1 gallon of gas.
    Now the gears are turning. I wonder if the accuracy is only there at flow rates the system was designed for. It would be great if it read way low if you stuck a powerful pump between your car and the pump sealed against the nozzle and sucked the gas out of the pump at great speed.

  7. #127
    M5eater's Avatar
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    Re: ATS and MPG - What are you getting?

    Now the gears are turning. I wonder if the accuracy is only there at flow rates the system was designed for. It would be great if it read way low if you stuck a powerful pump between your car and the pump sealed against the nozzle and sucked the gas out of the pump at great speed
    Interesting idea. What I will say is, Convenience stores sell gas to get you to come into the store and spend money there. Typically margins for a gallon of 87 are between 5-15 cents and for premium anywhere between 20-40 cents per gallon. That's before upkeep of the pumps, lights to illuminate them, state regulators coming out and inspecting the units (or tank), equipment repair/replacement, and trying to stay ahead of the other 3 stores within walking distance by .01 cents.

    I would like to believe that they make every attempt to limit their costs with gas.

  8. #128
    jeffroeson is offline Cadillac Owners Fanatic
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    Re: ATS and MPG - What are you getting?

    Just returned from a 2700 mile round trip from Iowa to Mississippi. Whe driving at highway speeds I kept cruise on 77 MPH and made passing speeds from 85-90 MPH. Just a guess, but I would believe I had cruise on 80-85% of time. For the eight tank fills I got from 23 to 28.7 on the trip while using 93 octane.

    Before the trip the only other tank fill I can give a representative highway speed result was 30.1 MPG. Since my engine now has a map of long distance driving I plan to do a trip soon to see what a constant 70 MPH can achieve.

  9. #129
    nc-atsman's Avatar
    nc-atsman is offline Cadillac Owners Member
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    On the road my 3.6 gets 26-29 mpg. Around town with some highway I have been 24-25 mpg. My only issue is when my son (19 years old!) takes it for a drive the mileage miraculously drops 4 or 5 mpg! His only comment is "if you have it then why not use it!". Who would have ever thought a testosterone laden 19 year old would desire to drive his Dads Caddy because it is so cool. This is not your fathers Cadillac!

  10. #130
    derek98z is offline Cadillac Owners Member
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    Re: ATS and MPG - What are you getting?

    Quote Originally Posted by derek98z View Post
    80% highway and I have 1,200 miles. 25.3
    I have a feeling it is because of those times when I'm oly getting 9 mpg lol
    So I now have 2,100 miles. Was using QuikTrip 91 and getting between 23-25. I just switched to BP 91 that has NO additives. It is a lot more expensive but I wanted to give it a shot. I'm getting over 28 mpg! I know those "cleaning agents" definately hurt the mpg's

  11. #131
    dfd
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    ATS4 2.0T fuel mileage update

    I've just recently competed a road trip over the holidays and wanted to share some fuel mileage observations

    My car is a '14 ATS AWD with the 2.0T engine, automatic, Canadian spec

    The conditions for this leg of the trip:

    Temperature: -4C/25F
    Winds: calm
    Fuel octane: 91
    Distance: 550km/340 miles
    Average Speed (cruise control): 115kph/78mph
    Tires: WINTER tires, 225/45R17, running Front/Rear: 240/260 kpa or 35/38 psi
    Odometer: 3500km / 2175 miles

    Average fuel consumption for that leg: 8.1 l/100km or 29 US mpg or 35 Imp mpg

    I am sure the numbers would have been better if I drove slower and was running the summer tires that came on the car.

    On another note, including this trip and some city driving including some snow falls in the last few days, I am averaging 9.3 l/100km or 25 US mpg or 30 Imp mpg

    Overall, quite happy with these results, considering the conditions, the AWD and the fact that I'm not babying the car
    investor74 likes this.

  12. #132
    Ragtop 99's Avatar
    Ragtop 99 is offline Cadillac Owners Connoisseur
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    Re: ATS4 2.0T fuel mileage update

    That's impressive for that speed.

  13. #133
    Siren05's Avatar
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    Re: ATS4 2.0T fuel mileage update

    Somthing smells funny. I'm averaging 12.8L per 100km. On 24000kms. And I don't push her that hard.
    Too often. I'm tuned otherwise stock

  14. #134
    dfd
    dfd is offline Cadillac Owners Member
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    Re: ATS4 2.0T fuel mileage update

    Quote Originally Posted by Siren05 View Post
    Somthing smells funny. I'm averaging 12.8L per 100km. On 24000kms. And I don't push her that hard.
    Too often. I'm tuned otherwise stock
    Siren05

    I used to average 12/13 l/100km on the first 2000 km. this is for the 550 km highway drive between Montreal Toronto. My new average takes into account 500 km of highway and approx 200 of city.

    Hopefully it will continue to improve. I hope I can hit lifetime average of 10 l/100km which I used to have with my 2.0T DSG VW CC

  15. #135
    TOSO is offline Cadillac Owners Member
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    Re: ATS4 2.0T fuel mileage update

    I also have the 2.0t Luxury with an automatic. I purchased the car at the beginning of August and have 12,700 miles on it. My lifetime MPG is 26 with the vast majority of those miles being on the interstate at 75 to 78 MPH.

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