Cadillac Forums | Help Us Help You | Advertise | Cadillac Parts | Cadillac News | Cadillac Classifieds

Cadillac Technical Archive | Cadillac Dealers | Cadillac Reviews | Cadillac Dealer Reviews | Cadillac Vendors is the premier Cadillac Forum on the internet. Registered Users do not see the above ads.
+ Reply to Thread
Results 1 to 4 of 4
500, 472, 425, 368 Discussion, mileage in Cadillac Engine Discussion; Hi, I have a 1980 cdv, 46000 miles,368 just had carb, professionaly rebuilt ( show car standards) about 3 ...
  1. #1
    creeker is offline Cadillac Owners Connoisseur
    Automobile(s): 1992 eldorado. 2007 dodge magnum hemi r/t
    Join Date
    Nov 2005
    roberts creek b.c. canada


    Hi, I have a 1980 cdv, 46000 miles,368 just had carb, professionaly
    rebuilt ( show car standards) about 3 mos. ago, does anyone know what kind of gas mileage I should be getting, it seems to guzzle gas like it's going out of style,I'm not a lead foot either, also have a new k&n filter,plugs,rotor
    and plug leads.
    Tnx Ken

  2. Remove Advertisements

  3. #2
    CadiJeff's Avatar
    CadiJeff is offline Cadillac Owners Connoisseur
    Automobile(s): 1981 CoupeDeville, 2 1990 Eldorados, 1994ETC ,1992STS
    Join Date
    Feb 2004

    Re: mileage

    my 81 cdv has EFI but I get 15 in town and 23 hwy

  4. #3
    472's Avatar
    472 is offline Cadillac Owners Fanatic
    Automobile(s): 55 60S, 81 DeVille (Diesel), 83 Coupe (507), 84 Wood (425)
    Join Date
    Dec 2004

    Re: mileage

    Man, that's a tough one. My best educated guess would only be about 10-12 city, and 14-17 highway. It wouldn't suprise me if stock specs were higher, and someone may chime in with better, but in my experience - gas goes bye bye. My 1979 Coupe Deville (425) got like 6+ city, and 12 or so highway, and my 1979 Bonneville (301 4bbl) gets about 8 city, and about 16 highway. Lastly, my 1983 Coupe with a built 507 and locked 3.42's gets better than the 425 or 301 (not working as hard [bogging]) if I keep the pedal off the metal. MPG is circumstantial to too many things to lay it on paper accurately

  5. #4
    caddydaddy's Avatar
    caddydaddy is offline Cadillac Owners Connoisseur
    Automobile(s): 2005 Escalade 6.0L 2WD, 2007 Jeep Grand Cherokee Limited CRD
    Join Date
    Jan 2003
    Gales Ferry, CT

    Re: mileage

    My '79 Deville with the stock 425 got as high as 17 mpg on the highway. The smaller 368 should get at least that.

  6. Remove Advertisements
    Cadillac Forums

+ Reply to Thread

Quick Reply Quick Reply

Register Now

Please enter the name by which you would like to log-in and be known on this site.

Please enter a password for your user account. Note that passwords are case-sensitive.

Please enter a valid email address for yourself.

What Cadillac(s) do you own? (Or type NONE)

Please select your insurance company (Optional)

Your date of birth and age are displayed in several places on the forum. Only the administrator will have access to your date of birth should you choose to hide it via the privacy option below.


Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.


Cadillac Posting Rules

  • You may post new threads
  • You may post replies
  • You may not post attachments
  • You may not edit your posts