Gas Mileage for 2005-2007 STS's, both RWD & AWD - Page 3
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Cadillac STS Forum - 2005 through 2012 Discussion, Gas Mileage for 2005-2007 STS's, both RWD & AWD in Past Cadillac Vehicle Discussion; Originally Posted by Smiling Jack 2006 V6 RWD, brand new Michelin Pilots, original (staggered) wheel and tire sizes, negligible wind, ...
  1. #31
    Budabear's Avatar
    Budabear is offline Cadillac Owners Member
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    Re: Gas Mileage for 2005-2007 STS's, both RWD & AWD

    Quote Originally Posted by Smiling Jack View Post
    2006 V6 RWD, brand new Michelin Pilots, original (staggered) wheel and tire sizes, negligible wind, 83 F outside air, A/C on, extremely level terrain, all highway, frequent overpass humps, typically 60 - 65 mph, occasionally slower, light traffic, ~3/4 full of fuel.

    31.6 (per DIC)mpg on 10 mile trip to airport with only myself in the car.

    30.6 mpg on return trip with 2 added passengers plus luggage.


    Not bad, but not particularly impressive for the V6 considering that my '95 Seville STS N* V8 used to do about the same and was considerably quicker and also roomier.
    Definitely great mileage! I'm still torn between the V6 and V8 because both seem to do extremely well but the V8 has that punch. Lol

    ----------

    Quote Originally Posted by ghostdriver View Post
    I have a 2007 STS V8 4.6L. It's rated about 27 Highway / 17 City. I have a long commute but it's through stop-and-go traffic more often than not. It's also our family car so we drive it around town as well. I'm averaging about 18MPG according to the readout on the display.
    18 in the city is very good for a large car.

  2. #32
    02603sec's Avatar
    02603sec is offline Cadillac Owners Fanatic
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    Ive driven my 1sf 4.6 back and forth from philly to chicago a dozen times. 80 mph 2600 rpm passing everyone some faster then others. 22 mpg. Around northern Bucks 19.5. The dic is very accurate on fillups and miles in left in the tank. The latter is one of my favorite features. 9.5 hours my best eta. Absolutely would not buy a caddy with a 6. Will have to go back to BMW.

  3. #33
    EChas3's Avatar
    EChas3 is offline Cadillac Owners Master
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    Re: Gas Mileage for 2005-2007 STS's, both RWD & AWD

    Quote Originally Posted by ghostdriver View Post
    I have a 2007 STS V8 4.6L. It's rated about 27 Highway / 17 City. I have a long commute but it's through stop-and-go traffic more often than not. It's also our family car so we drive it around town as well. I'm averaging about 18MPG according to the readout on the display.
    I'd call that typical. City driving in a 2-ton car sucks gas. The N* breathes great above 2k RPM, but inhales gas.

  4. #34
    Budabear's Avatar
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    Re: Gas Mileage for 2005-2007 STS's, both RWD & AWD

    Quote Originally Posted by 02603sec View Post
    Ive driven my 1sf 4.6 back and forth from philly to chicago a dozen times. 80 mph 2600 rpm passing everyone some faster then others. 22 mpg. Around northern Bucks 19.5. The dic is very accurate on fillups and miles in left in the tank. The latter is one of my favorite features. 9.5 hours my best eta. Absolutely would not buy a caddy with a 6. Will have to go back to BMW.
    This sounds like why I got rid of my Seville STS. Using that much gas on the highway I'd never keep it. Unfortunately I do realize now it was my fault. I have a heavy foot and believe now that I would have gotten much better mileage if I had taken it closer to the speed limit. On long distance trips I'd take it as high as my pace car and quite often that was VERY HIGH.

  5. #35
    EChas3's Avatar
    EChas3 is offline Cadillac Owners Master
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    Re: Gas Mileage for 2005-2007 STS's, both RWD & AWD

    Given the low relative cost of these cars, I'm not concerned about mileage. A $10,000 price differential to similarly equipped cars buys a lot of gas. (Keyless entry, ACC, HUD, etc.)

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