what's caused my mileage to drastically drop from 28 mpg to 15 mpg?

Asked by Oct 21, 2016 at 02:47 PM about the 2004 Hyundai Santa Fe GLS 2.7L

Question type: Maintenance & Repair

What parts cost to fix this. What pars do I need to
try to fix

6 Answers

25

Have you changed your driving or added weight inside the vehicle

116,495

When is the last time you did a complete tune-up on the car ???? are your under inflated ???

Check the air filter first. That's the most common cause.

95,705

Does the car have a lot of miles on it? If so it may be worn out but I would check the catalytic converter to see if it is plugged up. Like joemom says do a tuneup and check the air in your tires but those would probably only account for a 10% or so drop in mileage.

21,120

Also add some fuel injector cleaner to gas tank and clean throttle body with throttle body cleaner.

75,515

Is the transmission, if automatic, upshifting properly and into the highest gear? If not, that'll absolutely kill your gas mileage! Is the check engine light on? HTH. -Jim

Your Answer

Santa Fe

Looking for a Used Santa Fe in your area?

CarGurus has 17,789 nationwide Santa Fe listings starting at $1,950.

ZIP:

Hyundai Santa Fe Experts

  • #1
    me29
    Reputation
    3,940
  • #2
    LouB
    Reputation
    3,790
  • #3
    cargurus55
    Reputation
    1,160
View All

Related Models For Sale

Used Kia Sorento
465 Great Deals out of 34,900 listings starting at $1,800
Used Hyundai Tucson
216 Great Deals out of 21,884 listings starting at $1,995
Used Honda CR-V
784 Great Deals out of 63,568 listings starting at $1,495
Used Toyota Highlander
552 Great Deals out of 43,116 listings starting at $2,009
Used Toyota RAV4
676 Great Deals out of 63,266 listings starting at $1,995
Used Honda Pilot
637 Great Deals out of 38,029 listings starting at $1,999
Used Hyundai Sonata
626 Great Deals out of 54,780 listings starting at $1,500
Used Ford Escape
1,199 Great Deals out of 107,262 listings starting at $700
Used Ford Explorer
1,142 Great Deals out of 68,765 listings starting at $1,200
Used Nissan Murano
452 Great Deals out of 24,915 listings starting at $400
Used Chevrolet Equinox
1,044 Great Deals out of 78,437 listings starting at $2,222

Used Cars For Sale

2018 Hyundai Santa Fe For Sale
8,614 listings starting at $24,390
2017 Hyundai Santa Fe For Sale
73 Great Deals out of 3,114 listings starting at $15,691
2016 Hyundai Santa Fe For Sale
7 Great Deals out of 284 listings starting at $14,980
2015 Hyundai Santa Fe For Sale
26 Great Deals out of 521 listings starting at $13,995
2014 Hyundai Santa Fe For Sale
29 Great Deals out of 481 listings starting at $12,995

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.