what's caused my mileage to drastically drop from 28 mpg to 15 mpg?
6 Answers
COMETGUY61 answered 8 months ago
When is the last time you did a complete tune-up on the car ???? are your under inflated ???
F_O_R answered 8 months ago
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.
firebird338 answered 8 months ago
Also add some fuel injector cleaner to gas tank and clean throttle body with throttle body cleaner.
Js08016 answered 8 months ago
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
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