CTS-V Fuel Mileage
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2004-2007 Cadillac CTS-V General Discussion Discussion, CTS-V Fuel Mileage in Cadillac CTS-V Series Forum - 2004 - 2007; Im impressed to say the least. I went on a 800 mile 1 way 1600 round trip ride with my ...
  1. #1
    Outracin is offline Cadillac Owners Member
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    CTS-V Fuel Mileage

    Im impressed to say the least. I went on a 800 mile 1 way 1600 round trip ride with my friend in his 2006 cadoo cts-v. At 70 mph the car said it was averaging 27mpg. when we whipped out the calculator and figured it out on our own per the gallons we pumped in between stops, it was actually 27.6. All that Hp and tq and fuel economy to boot. That was impressive to me considering they claim 25 highway!

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  3. #2
    JimmyH is offline Cadillac Owners 10000+ Posts
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    Re: CTS-V Fuel Mileage

    To get that kind of mileage, it was probably non-CARB fuel.

  4. #3
    Outracin is offline Cadillac Owners Member
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    Re: CTS-V Fuel Mileage

    Quote Originally Posted by JimmyH View Post
    To get that kind of mileage, it was probably non-CARB fuel.
    the trip was from long island NY to hershey PA. Stayed there for a couple days then down south to TN. and home to NY. We figured the mpg in the PA to TN part of the trip, so you might be right

  5. #4
    Albertan is offline Cadillac Owners Enthusiast
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    Re: CTS-V Fuel Mileage

    Just back from Las Vegas. Round trip of 2600 miles. Running about 80 mph I was getting 24+ mpg. Lowest I got on highway was 21+ against headwind. Of course in Las Vegas I got hung up in traffic and was down to 15mpg. I remember my then new 1973 Vega (yes I bought one) would get about the same mileage but at slower speeds. They don't build them like they used to, and I am very thankful for that!

  6. #5
    NormV is offline Cadillac Owners Connoisseur
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    Re: CTS-V Fuel Mileage

    I noticed also that the computer is under rating MPG on long hauls over one tank. One hour trips it is over rating by 1 mpg.

    Get someone to program your pcm or do it yourself with hptuners like I did and few others and it is good for 2-3 mpg. I got 30 mpg at the speed limit from Ohio to Philly during labor day weekend. I'll be making trip again this holidays season at higher speeds for comparison.

    Norm

  7. #6
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    BadCad is offline Cadillac Owners Enthusiast
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    Re: CTS-V Fuel Mileage

    15 - 16 mpg for me. When I am good I get 17 - 18 mpg's. You guys drive downhill with a tailwind?

  8. #7
    NormV is offline Cadillac Owners Connoisseur
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    Re: CTS-V Fuel Mileage

    Quote Originally Posted by BadCad View Post
    15 - 16 mpg for me. When I am good I get 17 - 18 mpg's. You guys drive downhill with a tailwind?
    Mid to low 20's when I am entertaining but I drive 85% highway.

    It is all about rpms.

    Norm

  9. #8
    Twitch's Avatar
    Twitch is offline Cadillac Owners Connoisseur
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    Re: CTS-V Fuel Mileage

    The best I've done so far, is 23.5 on a two hour trip. Crouse control was set at 80. Around town is a different story.........

  10. #9
    cts-v ls6 is offline Cadillac Owners Fanatic
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    Re: CTS-V Fuel Mileage

    Have a Stealth V tune for 87 octane. Best so far is 29.2 from Memphs to St. Louis--but I had a tailwind. Best in still air has been 27.2 (twice) from Fayetteville, AR to Memphis.


    Jack

  11. #10
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    cobrayankee is offline Cadillac Owners Fanatic
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    Re: CTS-V Fuel Mileage

    Quote Originally Posted by BadCad View Post
    15 - 16 mpg for me. When I am good I get 17 - 18 mpg's. You guys drive downhill with a tailwind?
    Same here. I'll get 13mpg here in town and 22-24 on the highway. Average 17.xx mpg.

  12. #11
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    Re: CTS-V Fuel Mileage

    Quote Originally Posted by cts-v ls6 View Post
    Have a Stealth V tune for 87 octane. Best so far is 29.2 from Memphs to St. Louis--but I had a tailwind. Best in still air has been 27.2 (twice) from Fayetteville, AR to Memphis.


    Jack
    What do you mean "tune for 87 octane"?

  13. #12
    razl's Avatar
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    Re: CTS-V Fuel Mileage

    Quote Originally Posted by cts-v ls6 View Post
    Have a Stealth V tune for 87 octane. Best so far is 29.2 from Memphs to St. Louis--but I had a tailwind. Best in still air has been 27.2 (twice) from Fayetteville, AR to Memphis.


    Jack
    Quote Originally Posted by JimmyH View Post
    To get that kind of mileage, it was probably non-CARB fuel.
    what is non-CARB fuel?

  14. #13
    JimmyH is offline Cadillac Owners 10000+ Posts
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    Re: CTS-V Fuel Mileage

    Quote Originally Posted by razl View Post
    what is non-CARB fuel?
    you know, I dont know why I call it CARB fuel. It isnt really, unless you are in California.

    The clean air act, in it's current iteration, was enacted in 1990. It includes extra fuel additives (like ethanol) which promote cleaner burning, and fewer emissions, but reduce combustion efficiency, lowering mileage and horsepower. I believe every major metropolitan market has it now. Out in the boonies, where smog is not a problem, they don't have to use it. Hence, the gas is cheaper, and you get better mileage and more power.

    Actually, if all 50 states could get together and decide on one single formula of gas, we could probably save alot of money on gas. As it stands now, there is somewhere north of 100 different formulas being used in the US right now.


    http://www.epa.gov/air/caa/

  15. #14
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    NIK
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    Re: CTS-V Fuel Mileage

    Round-trip Bethlehem, PA to Cape Cod (710 miles total). Door to door to and from Bethlehem, including side trips and delays coming and going on the George Washington bridge, cruise control at 70 MPH and air conditioner on at all times (trip was in August) - Average MPG was 23.3. I remember when I was a kid that the VW bugs maybe averaged 20 MPG and everyone thought that was awesome!

    In our case with the "V", on the highway your best friend is 6th gear as soon as possible.

  16. #15
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    rand49er is offline Cadillac Owners 10000+ Posts
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    Re: CTS-V Fuel Mileage

    Northern Michigan (we call "hilly" but some of you might go ) going to see in-laws in Mackinaw City, got 26.2 MPG at constant 70 MPH with very slight (~3 MPH) mostly tailwind, 75 degrees in August, AC on, for 150 miles. BTW, this was when I was bone stock.
    '05 CTS-V, Maggie, Kooks, Hotchkis, Ground Control, Corsa, B&M, DSS/Hendrix, Full 3M Clear Bra, Autovation, V Headrests, CTS Console, STS-V 55w Fogs, Black Vette FRCs, Specter Werkes, Katech LS9 Clutch, SS Brake Lines, Heavymetals U-Turn Fuel Line Eliminator, Momo Combat Evo Shift Knob, Wldwhl Clear Sidemarkers, Linea Corse LC855 Wheels or OEM wheels w/'06-'07 Center Caps, plus a couple more. 472 RWHP/411 RWTQ (Mustang Dyno).

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