Gas mileage!!!!!!!
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Cadillac Catera and Cimarron Forum Discussion, Gas mileage!!!!!!! in Past Cadillac Vehicle Discussion; What gas mileage you have !!!!!??? I own 2000 sport using highest octane gas (its by manual) and my gas ...
  1. #1
    JohnJJO's Avatar
    JohnJJO is offline Cadillac Owners Fanatic
    Automobile(s): 2000 Catera Sport
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    Gas mileage!!!!!!!

    What gas mileage you have !!!!!???
    I own 2000 sport using highest octane gas (its by manual) and my gas mileage horrible only getting 210miles per tank !!!!
    what i can do or what need to be change to get batter gas mileage
    I already done:
    ----year old oem spark plugs, injectors was handy cleaned (not cleaner in fuel tank)
    ----2,4,6 cylinder coil was replaced due to misfire
    ----fuel filter like 1,5 year old (it's should be less the 15k mile on it )
    ----both O2 sensors that before cat. were replaced due to check engine light
    ----seafome air system few times already since i got this car (curenly exhaust coming out fine)
    ----recently took car to mechanic (had some problem that were fix) he tasted fuel pump also and it was working fine
    ----currently i using 15w-40 oil due to weak oil pump (but that will use 10 -15 miles extra per full fuel tank)thats not big deal
    ----just replaced air filter (my old one was not even dirty but i replaced any way) thought it will help - but it didn't

    what can be wrong or just not working right that can makes my car eat gas like that

    any ideas?????????
    Thank you

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  3. #2
    kaustein is offline Cadillac Owners Enthusiast
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    Re: Gas mileage!!!!!!!

    Never got better than what you got. MPG sucked even with higher octane.

  4. #3
    JohnJJO's Avatar
    JohnJJO is offline Cadillac Owners Fanatic
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    Re: Gas mileage!!!!!!!

    no!!!! minimum what i used to get was like 250 !!!!!! some time was reaching up to 270!!!!

  5. #4
    hemic05 is offline Cadillac Owners Fanatic
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    Re: Gas mileage!!!!!!!

    I get 20 all ways

  6. #5
    retho78 is online now Cadillac Owners Enthusiast
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    Re: Gas mileage!!!!!!!

    21-23 for me.

  7. #6
    JohnJJO's Avatar
    JohnJJO is offline Cadillac Owners Fanatic
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    Re: Gas mileage!!!!!!!

    OMG!!!!!! Why i have 12mpg !!!!!!! OMG!!!. help !!!
    i was thinking maybe replace spark plugs to "Pulstar" and replace coil for 1,3,5 cylinder cuz i already replace for 2,4,6 like year ago, and on 1,3,5 is original 12 years old!!!!!
    HELP !!!!! HELP !!!!

  8. #7
    kaustein is offline Cadillac Owners Enthusiast
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    Re: Gas mileage!!!!!!!

    Assumeing your not beating the car via stop and go, I'd check for a fuel leak. Filter can be problematic

  9. #8
    retho78 is online now Cadillac Owners Enthusiast
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    Re: Gas mileage!!!!!!!

    I use premium gas all the time, not sure if that makes any difference. Like "Kaustein" mentioned check the fuel filter also.

  10. #9
    kaustein is offline Cadillac Owners Enthusiast
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    Re: Gas mileage!!!!!!!

    Quote Originally Posted by retho78 View Post
    I use premium gas all the time, not sure if that makes any difference. Like "Kaustein" mentioned check the fuel filter also.
    The car isn't worth the cost of premium gas. Never had any issues with 87 octane

  11. #10
    retho78 is online now Cadillac Owners Enthusiast
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    Re: Gas mileage!!!!!!!

    My car would feel sluggish sometimes so decided to stay with premium gas.

  12. #11
    hemic05 is offline Cadillac Owners Fanatic
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    Re: Gas mileage!!!!!!!

    I also use premium the car runs smoooooother if i dont you hear valve ping dont need that

  13. #12
    98Catera_2010's Avatar
    98Catera_2010 is offline Cadillac Owners Fanatic
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    Re: Gas mileage!!!!!!!

    I'm guessing you didn't read your manual either which states the use of premium gas. Its worth it if you want to still drive the car without damaging the engine.
    Quote Originally Posted by kaustein View Post
    The car isn't worth the cost of premium gas. Never had any issues with 87 octane

  14. #13
    kaustein is offline Cadillac Owners Enthusiast
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    Re: Gas mileage!!!!!!!

    Quote Originally Posted by 98Catera_2010 View Post
    I'm guessing you didn't read your manual either which states the use of premium gas. Its worth it if you want to still drive the car without damaging the engine.
    Yup, I read it. Used it once with no problem so I stayed with it.

  15. #14
    jpgrod is offline Cadillac Owners Member
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    Re: Gas mileage!!!!!!!

    i drove 300 miles from Findlay Ohio to Dayton Ohio had to fill up went I got back to Findlay highway miles . That was with a bad o2 senser bank1 censer 1 !

  16. #15
    IvoryWhiteCatera's Avatar
    IvoryWhiteCatera is offline Cadillac Owners Fanatic
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    Re: Gas mileage!!!!!!!

    Quote Originally Posted by kaustein View Post
    Yup, I read it. Used it once with no problem so I stayed with it.
    Haha, Kaustein is right. I use regular all the time. BTW I get nearly 350 miles per tank.

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