I have a 2001 Hyundai Elantra. I bought this new in Indiana and moved
to Ohio two years later in 2003. Since moving to Ohio the fuel economy
of the car deteriorated drastically (by ~5 mpg in city) with more or
less the same driving conditions. I have consultated with the local
dealers in Greater Cleveland and other shops. Eventually a dealership
told me that unlike other sates Ohio gas stations are not federally
obligated to maintain a certain standard of petroleum. Is there anybody
out there from Ohio, who has experienced the same problem?
Peace.