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 3 of 3
Cadillac Seville / Cadillac Eldorado Forum Discussion, mileage in Past Cadillac Vehicle Discussion; My mileage has gone from a great 28-31 highway to 21-23 overnight. I drive a 98 northstar. Any thoughts? Thks....
  1. #1
    98Eldy is offline Cadillac Owners Member
    Automobile(s): Eldorado
    Join Date
    Aug 2003
    So. Calif. Desert


    My mileage has gone from a great 28-31 highway to 21-23 overnight.
    I drive a 98 northstar. Any thoughts? Thks.

  2. Remove Advertisements

  3. #2
    Loud 93 STS is offline Cadillac Owners Member
    Join Date
    Aug 2003
    Murfreesboro, TN

    Gas Mileage

    Have you switched brands of gas? That can definately sometimes afect mileage. Or have you put in an new air filter? That is another thing that can help out mileage. Other than that I really have no clue.

  4. #3
    Katshot's Avatar
    Katshot is offline Cadillac Owners Master
    Join Date
    Jan 2003
    Newtown, PA

    Re: Gas Mileage

    Unless you changed something like fuel, oil, some sort of parts on the car, etc. it could be a plug went south on you, or maybe an ignition wire, coil, or even an O2 sensor.

  5. 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