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

113,645

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.

86,625

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.

20,430

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

72,515

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 18,352 nationwide Santa Fe listings starting at $1,295.

ZIP:

Hyundai Santa Fe Experts

  • #1
    me29
    Reputation
    3,780
  • #2
    LouB
    Reputation
    3,650
  • #3
    cargurus55
    Reputation
    1,140
View All

Related Models For Sale

Used Kia Sorento
498 Great Deals out of 32,414 listings starting at $2,290
Used Hyundai Tucson
261 Great Deals out of 20,913 listings starting at $1,795
Used Honda CR-V
933 Great Deals out of 60,379 listings starting at $1,495
Used Toyota Highlander
611 Great Deals out of 38,160 listings starting at $2,500
Used Toyota RAV4
842 Great Deals out of 54,445 listings starting at $999
Used Hyundai Sonata
940 Great Deals out of 56,589 listings starting at $1,000
Used Honda Pilot
755 Great Deals out of 41,334 listings starting at $998
Used Nissan Murano
445 Great Deals out of 23,600 listings starting at $400
Used Ford Escape
1,300 Great Deals out of 104,989 listings starting at $895
Used Ford Explorer
1,264 Great Deals out of 70,145 listings starting at $1,000
Used Chevrolet Equinox
1,172 Great Deals out of 70,975 listings starting at $1,000
Used Kia Sportage
250 Great Deals out of 18,918 listings starting at $1,795

Used Cars For Sale

2018 Hyundai Santa Fe For Sale
7,684 listings starting at $24,260
2017 Hyundai Santa Fe For Sale
73 Great Deals out of 4,234 listings starting at $15,991
2016 Hyundai Santa Fe For Sale
14 Great Deals out of 351 listings starting at $13,791
2015 Hyundai Santa Fe For Sale
17 Great Deals out of 422 listings starting at $15,990
2014 Hyundai Santa Fe For Sale
27 Great Deals out of 557 listings starting at $13,569

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.