Hello
I have a 2005 Hyundai Tucson V6 4WD...now according to everything I can find on Google it says that my gas mileage is around 19 city/24 highway. If I add a fuel additive like STP or Seafoam I can bump that up a little higher to around 20-21 city, but of course that fall back down after a couple of fill-ups if I don't put an additive in. I've done all the usual stuff to help keep my mpg good. Tire properly inflated, air filter is clean, regular lube and oil. Is there anything else I can do to try and bump up my mileage and keep it up. It's a good car but lousy gas mileage.
What makes this problem better or worse?
fule additive improves mileage
How long has your 2005 Hyundai Tucson had this problem?
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I’m assuming you have the 4wd version.
(I see - 4WD)